SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>

scripts/Makefile

@@ -1,11 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
 ###
 # scripts contains sources for various helper programs used throughout
 # the kernel for the build process.
 # ---------------------------------------------------------------------------
 # docproc:       Used in Documentation/DocBook
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 hostprogs-$(CONFIG_BUILD_BIN2C)		+= bin2c
 

scripts/Makefile.autoconf

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 # This helper makefile is used for creating
 #  - symbolic links (arch/$ARCH/include/asm/arch
 #  - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
@@ -6,9 +7,6 @@
 # When our migration to Kconfig is done
 # (= When we move all CONFIGs from header files to Kconfig)
 # this makefile can be deleted.
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 __all: include/autoconf.mk include/autoconf.mk.dep
 

scripts/Makefile.build

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
 # ==========================================================================
 # Building
 # ==========================================================================
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 # Modified for U-Boot
 prefix := tpl

scripts/Makefile.clean

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
 # ==========================================================================
 # Cleaning up
 # ==========================================================================
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 src := $(obj)
 

scripts/Makefile.extrawarn

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 # ==========================================================================
 #
 # make W=... settings
@@ -9,9 +10,6 @@
 # $(call cc-option, -W...) handles gcc -W.. options which
 # are not supported by all versions of the compiler
 # ==========================================================================
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 ifeq ("$(origin W)", "command line")
   export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)

scripts/Makefile.host

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 # ==========================================================================
 # Building binaries on the host system
 # Binaries are used during the compilation of the kernel, for example
@@ -19,9 +20,6 @@
 # qconf-objs      := menu.o
 # Will compile qconf as a C++ program, and menu as a C program.
 # They are linked as C++ code to the executable qconf
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
 

scripts/Makefile.lib

@@ -1,6 +1,4 @@
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
+# SPDX-License-Identifier: GPL-2.0
 # Backward compatibility
 asflags-y  += $(EXTRA_AFLAGS)
 ccflags-y  += $(EXTRA_CFLAGS)

scripts/Makefile.spl

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2000-2011
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -8,9 +9,6 @@
 # (C) Copyright 2011
 # Texas Instruments Incorporated - http://www.ti.com/
 # Aneesh V <aneesh@ti.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 # Based on top-level Makefile.
 #
 

scripts/Makefile.uncmd_spl

@@ -1,7 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
 # Makefile version of include/config_uncmd_spl.h
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 # TODO: Invent a better way
 
 ifdef CONFIG_SPL_BUILD

scripts/basic/Makefile

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 ###
 # Makefile.basic lists the most basic programs used during the build process.
 # The programs listed herein are what are needed to do the basic stuff,
@@ -7,9 +8,6 @@
 # .config is included by main Makefile.
 # ---------------------------------------------------------------------------
 # fixdep: 	 Used to generate dependency information during build process
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 hostprogs-y	:= fixdep
 always		:= $(hostprogs-y)

scripts/coreboot.sed

@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2016 Google, Inc
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 # Script to convert coreboot code to something similar to what U-Boot uses
 # sed -f coreboot.sed <coreboot_file.c>
 # Remember to add attribution to coreboot for new files added to U-Boot.

scripts/fill_scrapyard.py

@@ -1,9 +1,8 @@
 #!/usr/bin/env python2
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
 #
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 """
 Fill the "Commit" and "Removed" fields of doc/README.scrapyard

scripts/gcc-stack-usage.sh

@@ -1,9 +1,8 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
 # Test for gcc '-fstack-usage' support
 # Copyright (C) 2013, Masahiro Yamada <yamada.m@jp.panasonic.com>
 #
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 TMP="$$"
 

scripts/get_default_envs.sh

@@ -1,9 +1,8 @@
 #! /bin/bash
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2016, Lukasz Majewski <l.majewski@majess.pl>
 #
-# SPDX-License-Identifier:      GPL-2.0+
-#
 
 # This file extracts default envs from built u-boot
 # usage: get_default_envs.sh [build dir] > u-boot-env-default.txt

scripts/kconfig/Makefile

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
 # ===========================================================================
 # Kernel configuration targets
 # These targets are used from top-level makefile
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 PHONY += xconfig gconfig menuconfig config silentoldconfig update-po-config \
 	localmodconfig localyesconfig

scripts/kconfig/lxdialog/checklist.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  checklist.c -- implements the checklist box
  *
@@ -5,8 +6,6 @@
  *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
  *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "dialog.h"

scripts/kconfig/lxdialog/dialog.h

@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  dialog.h -- common declarations for all dialog modules
  *
  *  AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <sys/types.h>

scripts/kconfig/lxdialog/inputbox.c

@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  inputbox.c -- implements the input box
  *
  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "dialog.h"

scripts/kconfig/lxdialog/menubox.c

@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  menubox.c -- implements the menu box
  *
  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /*

scripts/kconfig/lxdialog/textbox.c

@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  textbox.c -- implements the text box
  *
  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "dialog.h"

scripts/kconfig/lxdialog/util.c

@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  util.c
  *
  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <stdarg.h>

scripts/kconfig/lxdialog/yesno.c

@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  yesno.c -- implements the yes/no box
  *
  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include "dialog.h"

scripts/mailmapper

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #!/usr/bin/env python2
 #
 # Copyright (C) 2014, Masahiro Yamada <yamada.m@jp.panasonic.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 '''
 A tool to create/update the mailmap file

scripts/show-gnu-make

@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Show the command name for GNU Make
 #
@@ -8,9 +9,6 @@
 # It is not a good idea to hard-code the command name in scripts
 # where where GNU Make is expected.
 # Call this helper script to get the command name for GNU Make.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 gnu_make=