[OpenBIOS] [PATCH] Fix PowerPC build

[Aurelien Jarno]

Given openbios overrides <asm/types.h> with its own version, it should
provides at least the same types for the included kernel headers. This
fixes the following build failure:

| HOSTCC host/kernel/bootstrap.o
| In file included from /usr/include/asm/ptrace.h:28,
|                  from /usr/include/asm/sigcontext.h:12,
|                  from /usr/include/bits/sigcontext.h:29,
|                  from /usr/include/signal.h:340,
|                  from ../kernel/bootstrap.c:14:
| /usr/include/linux/types.h:27: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__le16'
| /usr/include/linux/types.h:28: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__be16'
| /usr/include/linux/types.h:29: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__le32'
| /usr/include/linux/types.h:30: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__be32'
| /usr/include/linux/types.h:31: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__le64'
| /usr/include/linux/types.h:32: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__be64'
| /usr/include/linux/types.h:34: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__sum16'
| /usr/include/linux/types.h:35: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__wsum'
| In file included from /usr/include/asm/sigcontext.h:12,
|                  from /usr/include/bits/sigcontext.h:29,
|                  from /usr/include/signal.h:340,
|                  from ../kernel/bootstrap.c:14:
| /usr/include/asm/ptrace.h:201: error: expected specifier-qualifier-list before '__u32'
| In file included from /usr/include/asm/sigcontext.h:12,
|                  from /usr/include/bits/sigcontext.h:29,
|                  from /usr/include/signal.h:340,
|                  from ../kernel/bootstrap.c:14:
| /usr/include/asm/ptrace.h:223: error: expected specifier-qualifier-list before '__u32'
| make[1]: *** [host/kernel/bootstrap.o] Error 1

Signed-off-by: Aurelien Jarno

--- a/include/arch/ppc/types.h
+++ b/include/arch/ppc/types.h
@@ -75,4 +75,10 @@ typedef short		s16;
 typedef int		s32;
 typedef long long	s64;

+/* Needed by kernel includes */
+typedef u8   __u8;
+typedef u16 __u16;
+typedef u32 __u32;
+typedef u64 __u64;
+
 #endif