Hello,

Per my last post to an old thread.  This adds NUM_REGS pseudo registers 
to the MIPS.  These pseudo registers, unlike their raw counterparts are 
`sane'.  They have sensible sizes, offsets, types, ...

The intent here is to put some distance between the MIPS's messed up raw 
register buffer and the ABI registers.  As it stands, it doesn't get 
save/restore right (it works but not by using the ABI registers).  That 
can follow.

Tested on mips-elf.

thoughts?
Andrew