Patch from Dave Jiang

This fixes compile error where u32 was not recognized by iop321.h and iop331.h. Started showing up in 2.6.9-rcX that wasn't there in 2.6.8.1. 
Added include of <asm/types.h> to asm/arch/hardware.h where it would propogate to both headers. 

Signed-off-by: Dave Jiang (dave.jiang@gmail.com)