[PATCH] x86_64: Minor clean up to CPU setup - use smp_processor_id instead of custom hack

Does not change any semantics because numa_add_cpu checks for CPU 0 anyways.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>