powerpc: clean inclusions of asm/feature-fixups.h

files not using feature fixup don't need asm/feature-fixups.h
files using feature fixup need asm/feature-fixups.h

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/entry_64.S

@@ -44,6 +44,7 @@
 #else
 #include <asm/exception-64e.h>
 #endif
+#include <asm/feature-fixups.h>
 
 /*
  * System calls.