Eliminate some useless printks in ACPI numa.c

They trigger all the time on x86-64 with CONFIG_ACPI_NUMA
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>