Fix bugs in the AMD K8 CMP support code.

Check the correct cpuid level and move numa_add_cpu to the correct place.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>