There's some ugliness (which I'm unfortunately responsible for) in some 
of the x440 specific code.  It's causing boot problems for us with 
certain configs.  This patch remedies those problems.

* There was an #ifdef'd call in setup_arch.  It's been moved into 
subarch code where it belongs.

* There were some ugly for loops that now are more readable.

* The NUMA-specific summit code is now only compiled in & executed if 
CONFIG_NUMA.

* The code checks that MAX_NUMNODES has a sane value before proceeding.

Compiled and tested on 16 x440s, both NUMA & SMP.

Cheers!

-Matt