NWFPE performance improvements, part 6.  Builds on patch 1468/1.

Break NWFPE initialization into separate function and call it from
entry.S as appropriate.  Also avoid nRc variable usage in EmulateAll().
This buys 6% speedup in NWFPE.  (Note that this is over half of the
total speedup between original RMK and the netwinder cvs version).

(note that 2.5 already has the separate initialisation, and this
cset actually makes 2.5 conform to 2.4 function naming for this
part. --rmk)