[PATCH] Use vm_paddr_t for physical address on MIPS

[Jayachandran C.]

There are a few places in MIPS where vm_offset_t is used for physical
addresses. The attached patch fixes them, and also contains changes to
use uintmax_t when printing PTE entries and physical addresses.

I plan to check this in if there are no objections, before checking in
the 64 bit PTE changes.  These changes will be useful if we decide to
have 64 bit physical address on n32(32bit) compilation.

JC.