u-boot_2017.11.bb: Add patch to fix conflicting types for fdt64_t

When libfdt-devel is installed system-wide, the build of U-Boot host
programs currently fails with lots of:

In file included from tools/../include/../lib/libfdt/libfdt.h:10:0,
                 from tools/../include/libfdt.h:1,
                 from tools/fdt_host.h:11,
                 from tools/imagetool.h:24,
                 from tools/aisimage.c:8:
/usr/include/libfdt_env.h:70:30: error: conflicting types for ‘fdt64_t’
   typedef uint64_t FDT_BITWISE fdt64_t;
                               ^~~~~~~
In file included from <command-line>:0:0:
././include/libfdt_env.h:19:16: note: previous declaration of ‘fdt64_t’ was here
   typedef __be64 fdt64_t;
                 ^~~~~~~
In file included from ././include/libfdt_env.h:12:0,
                  from <command-line>:0:
/usr/include/libfdt_env.h:90:24: error: expected ‘)’ before ‘x’
    static inline uint32_t fdt32_to_cpu(fdt32_t x)
                         ^

This commit adds a fixup in the U-Boot code to fix this problem

Signed-off-by: Vicentiu Galanopulo <vicentiu@balena.io>

layers/meta-balena-allwinner/recipes-bsp/u-boot/u-boot_2017.11.bb

@@ -63,6 +63,7 @@ SRC_URI = "git://git.denx.de/u-boot.git;branch=master \
         file://boot.cmd \
         file://0001-Increase-size-of-memory-available-to-bootm.patch \
         file://0002-Add-Resin-specific-boot-command.patch \
+        file://0003-libftd_fix.patch \
 "
 
 SRCREV = "v2017.11"

layers/meta-balena-allwinner/recipes-bsp/u-boot/u-boot_2017.11/0003-libftd_fix.patch

@@ -0,0 +1,35 @@
+From 6eecc74a9178ddd29375a6c3ee354f2e8b989c45 Mon Sep 17 00:00:00 2001
+From: Vicentiu Galanopulo <vicentiu@balena.io>
+Date: Thu, 26 Sep 2019 16:19:02 +0200
+Subject: [PATCH] Include U-Boot libfdt headers from their actual path
+
+There are no headers for libfdt in lib/libfdt, as they are instead
+located in scripts/dtc/libfdt. Specifying lib/libfdt for headers
+inclusion in host tools results in using the system libfdt headers,
+which is not what we want. Change this to the proper path.
+
+Signed-off-by:Paul Kocialkowski <contact@paulk.fr>
+
+Upstream-Status: Inappropriate [Backport]
+
+Signed-off-by: Vicentiu Galanopulo <vicentiu@balena.io>
+---
+ tools/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tools/Makefile b/tools/Makefile
+index 54bd22406a..39ccbaa881 100644
+--- a/tools/Makefile
++++ b/tools/Makefile
+@@ -266,7 +266,7 @@ endif # !LOGO_BMP
+ #
+ HOST_EXTRACFLAGS += -include $(srctree)/include/libfdt_env.h \
+ 		$(patsubst -I%,-idirafter%, $(filter -I%, $(UBOOTINCLUDE))) \
+-		-I$(srctree)/lib/libfdt \
++		-I$(srctree)/scripts/dtc/libfdt \
+ 		-I$(srctree)/tools \
+ 		-DUSE_HOSTCC \
+ 		-D__KERNEL_STRICT_NAMES \
+-- 
+2.17.1
+