u-boot: upgrade to 2018.09

Bump u-boot version. Notes:
- pylibfdt fix is not needed anymore
- add bison and flex as depenedencies
- update license info

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>

recipes-bsp/u-boot/files/0001-nanopi_neo_air_defconfig-Enable-eMMC-support.patch

@@ -10,17 +10,11 @@ Signed-off-by: Florin Sarbu <florin@resin.io>
  1 file changed, 1 insertion(+)
 
 diff --git a/configs/nanopi_neo_air_defconfig b/configs/nanopi_neo_air_defconfig
-index ca9c2dd..74ce044 100644
+index 8c362fa885..c7929ff015 100644
 --- a/configs/nanopi_neo_air_defconfig
 +++ b/configs/nanopi_neo_air_defconfig
-@@ -10,6 +10,7 @@ CONFIG_DEFAULT_DEVICE_TREE="sun8i-h3-nanopi-neo-air"
- # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
- CONFIG_CONSOLE_MUX=y
- CONFIG_SPL=y
+@@ -15,3 +15,4 @@ CONFIG_CONSOLE_MUX=y
+ CONFIG_DEFAULT_DEVICE_TREE="sun8i-h3-nanopi-neo-air"
+ CONFIG_USB_EHCI_HCD=y
+ CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
 +CONFIG_MMC_SUNXI_SLOT_EXTRA=2
- # CONFIG_CMD_FLASH is not set
- # CONFIG_SPL_DOS_PARTITION is not set
- # CONFIG_SPL_ISO_PARTITION is not set
--- 
-2.7.4
-

recipes-bsp/u-boot/files/u-boot-pylibfdt-native-build.patch

@@ -1,16 +0,0 @@
-diff --git a/scripts/dtc/pylibfdt/Makefile b/scripts/dtc/pylibfdt/Makefile
-index 01d5e0ffe3..2b2dfe0bd9 100644
---- a/scripts/dtc/pylibfdt/Makefile
-+++ b/scripts/dtc/pylibfdt/Makefile
-@@ -15,6 +15,8 @@ PYLIBFDT_srcs = $(addprefix $(LIBFDT_srcdir)/,$(LIBFDT_SRCS)) \
- 
- quiet_cmd_pymod = PYMOD   $@
-       cmd_pymod = unset CC; unset CROSS_COMPILE; unset CFLAGS;\
-+		CC="$(HOSTCC)" \
-+		LDSHARED="$(HOSTLDSHARED)" \
- 		LDFLAGS="$(HOSTLDFLAGS)" \
- 		VERSION="u-boot-$(UBOOTVERSION)" \
- 		CPPFLAGS="$(HOSTCFLAGS) -I$(LIBFDT_srcdir)" OBJDIR=$(obj) \
--- 
-2.11.0
-