dm: core: Create a new header file for 'compat' features

At present dm/device.h includes the linux-compatible features. This
requires including linux/compat.h which in turn includes a lot of headers.
One of these is malloc.h which we thus end up including in every file in
U-Boot. Apart from the inefficiency of this, it is problematic for sandbox
which needs to use the system malloc() in some files.

Move the compatibility features into a separate header file.

Signed-off-by: Simon Glass <sjg@chromium.org>

cmd/bootefi.c

@@ -13,6 +13,7 @@
 #include <efi_selftest.h>
 #include <env.h>
 #include <errno.h>
+#include <malloc.h>
 #include <linux/libfdt.h>
 #include <linux/libfdt_env.h>
 #include <mapmem.h>

cmd/gpio.c

@@ -10,6 +10,7 @@
 #include <command.h>
 #include <errno.h>
 #include <dm.h>
+#include <malloc.h>
 #include <asm/gpio.h>
 #include <linux/err.h>
 

cmd/host.c

@@ -8,6 +8,7 @@
 #include <fs.h>
 #include <part.h>
 #include <sandboxblockdev.h>
+#include <dm/device_compat.h>
 #include <linux/errno.h>
 
 static int host_curr_device = -1;

cmd/rng.c

@@ -8,6 +8,7 @@
 #include <command.h>
 #include <dm.h>
 #include <hexdump.h>
+#include <malloc.h>
 #include <rng.h>
 
 static int do_rng(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])

cmd/tpm-common.c

@@ -7,6 +7,7 @@
 #include <command.h>
 #include <dm.h>
 #include <env.h>
+#include <malloc.h>
 #include <asm/unaligned.h>
 #include <linux/string.h>
 #include <tpm-common.h>

cmd/ubi.c

@@ -15,6 +15,7 @@
 #include <command.h>
 #include <env.h>
 #include <exports.h>
+#include <malloc.h>
 #include <memalign.h>
 #include <mtd.h>
 #include <nand.h>

cmd/usb_mass_storage.c

@@ -11,6 +11,7 @@
 #include <command.h>
 #include <console.h>
 #include <g_dnl.h>
+#include <malloc.h>
 #include <part.h>
 #include <usb.h>
 #include <usb_mass_storage.h>

cmd/ximg.c

@@ -17,6 +17,7 @@
 #include <env.h>
 #include <gzip.h>
 #include <image.h>
+#include <malloc.h>
 #include <mapmem.h>
 #include <watchdog.h>
 #if defined(CONFIG_BZIP2)