Implement disjoint NUMA domain setup for IA64 architecture.  Most of the code
was what was ripped out of kernel/sched.c, which was written by Jesse Barnes
<jbarnes@sgi.com>.  I fixed up the tricky NUMA groups initialistion.
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>