uboot-kirkwood: fix build with gcc-5

This backports a patch from upstream u-boot to make it compile with gcc-5.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 47537

package/boot/uboot-kirkwood/patches/200-openwrt-config.patch

@@ -1,6 +1,6 @@
 --- a/arch/arm/cpu/arm926ejs/kirkwood/Kconfig
 +++ b/arch/arm/cpu/arm926ejs/kirkwood/Kconfig
-@@ -84,4 +84,7 @@
+@@ -84,4 +84,7 @@ source "board/raidsonic/ib62x0/Kconfig"
  source "board/Seagate/dockstar/Kconfig"
  source "board/Seagate/goflexhome/Kconfig"
  

package/boot/uboot-kirkwood/patches/400-gcc-5-compiler.patch

@@ -0,0 +1,87 @@
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Sat, 7 Feb 2015 21:52:40 +0000 (+0100)
+Subject: Add linux/compiler-gcc5.h to fix builds with gcc5
+X-Git-Tag: v2015.04-rc2~31
+X-Git-Url: http://git.denx.de/?p=u-boot.git;a=commitdiff_plain;h=478b02f1a7043b673565075ea5016376f3293b23
+
+Add linux/compiler-gcc5.h to fix builds with gcc5
+
+Add linux/compiler-gcc5/h from the kernel sources at:
+
+commit 5631b8fba640a4ab2f8a954f63a603fa34eda96b
+Author: Steven Noonan <steven@uplinklabs.net>
+Date:   Sat Oct 25 15:09:42 2014 -0700
+
+    compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+
+--- /dev/null
++++ b/include/linux/compiler-gcc5.h
+@@ -0,0 +1,65 @@
++#ifndef __LINUX_COMPILER_H
++#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead."
++#endif
++
++#define __used				__attribute__((__used__))
++#define __must_check			__attribute__((warn_unused_result))
++#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
++
++/* Mark functions as cold. gcc will assume any path leading to a call
++   to them will be unlikely.  This means a lot of manual unlikely()s
++   are unnecessary now for any paths leading to the usual suspects
++   like BUG(), printk(), panic() etc. [but let's keep them for now for
++   older compilers]
++
++   Early snapshots of gcc 4.3 don't support this and we can't detect this
++   in the preprocessor, but we can live with this because they're unreleased.
++   Maketime probing would be overkill here.
++
++   gcc also has a __attribute__((__hot__)) to move hot functions into
++   a special section, but I don't see any sense in this right now in
++   the kernel context */
++#define __cold			__attribute__((__cold__))
++
++#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
++
++#ifndef __CHECKER__
++# define __compiletime_warning(message) __attribute__((warning(message)))
++# define __compiletime_error(message) __attribute__((error(message)))
++#endif /* __CHECKER__ */
++
++/*
++ * Mark a position in code as unreachable.  This can be used to
++ * suppress control flow warnings after asm blocks that transfer
++ * control elsewhere.
++ *
++ * Early snapshots of gcc 4.5 don't support this and we can't detect
++ * this in the preprocessor, but we can live with this because they're
++ * unreleased.  Really, we need to have autoconf for the kernel.
++ */
++#define unreachable() __builtin_unreachable()
++
++/* Mark a function definition as prohibited from being cloned. */
++#define __noclone	__attribute__((__noclone__))
++
++/*
++ * Tell the optimizer that something else uses this function or variable.
++ */
++#define __visible __attribute__((externally_visible))
++
++/*
++ * GCC 'asm goto' miscompiles certain code sequences:
++ *
++ *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
++ *
++ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
++ *
++ * (asm goto is automatically volatile - the naming reflects this.)
++ */
++#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
++
++#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
++#define __HAVE_BUILTIN_BSWAP32__
++#define __HAVE_BUILTIN_BSWAP64__
++#define __HAVE_BUILTIN_BSWAP16__
++#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */