[PATCH] POWERPC/PPC64: Fix CONFIG_SMP=n build for ppc64

Two CONFIG_SMP=n build fixes due to missing <asm/smp.h> includes.

Signed-off-by: Olof Johansson <olof@lixom.net>
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>