powerpc: Factor do_feature_fixup calls

32 and 64-bit do a similar set of calls early on, we move it all to
a single common function to make the boot code more readable.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h
index 9a67a38..57fec8a 100644
--- a/arch/powerpc/include/asm/feature-fixups.h
+++ b/arch/powerpc/include/asm/feature-fixups.h
@@ -184,4 +184,8 @@
 	FTR_ENTRY_OFFSET label##1b-label##3b;		\
 	.popsection;
 
+#ifndef __ASSEMBLY__
+void apply_feature_fixups(void);
+#endif
+
 #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */