[PATCH] powerpc: fix for kexec ppc32

- kexec.h is included from assembly code, thus C code must be properly
  protected.

- (embedded) ppc32 systems use machine_kexec_simple whose declaration
  vanished during a recent powerpc merge change.

Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Cc: <fastboot@osdl.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-powerpc/kexec.h

@@ -33,6 +33,7 @@
 
 #ifdef CONFIG_KEXEC
 
+#ifndef __ASSEMBLY__
 #ifdef __powerpc64__
 /*
  * This function is responsible for capturing register states if coming
@@ -104,7 +105,6 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
 					struct pt_regs *oldregs) { }
 #endif /* !__powerpc64 __ */
 
-#ifndef __ASSEMBLY__
 #define MAX_NOTE_BYTES 1024
 
 #ifdef __powerpc64__
@@ -121,6 +121,8 @@ extern void default_machine_kexec(struct kimage *image);
 extern int default_machine_kexec_prepare(struct kimage *image);
 extern void default_machine_crash_shutdown(struct pt_regs *regs);
 
+extern void machine_kexec_simple(struct kimage *image);
+
 #endif /* ! __ASSEMBLY__ */
 #endif /* CONFIG_KEXEC */
 #endif /* __KERNEL__ */