Update define_function_units.

Update define_function_units.

Put both old and new mnemonics in all templates.
Add target tests to pattern conditional field throughout.
(one_cmplsi2): Make POWER and PowerPC variants.
(mulsi3): Convert to define_expand which calls appropriate POWER or PowerPC
pattern.
(divsi3, udivsi3): Add patterns for PowerPC case.  Update divsi3 define_expand
for PowerPC case.
(ashlsi3, lshrsi3, ashrsi3, extendqisi2, extendqihi2): Convert to
define_expand which calls appropriate POWER or PowerPC pattern.
(floating-point): Add PowerPC single-precision FP, and SF/DF sqrt insns for
603, 604, 620.
(call insns): Use "nop" for magic TOC restore.
(move data, nop): Use PowerPC extended mnemonics.

From-SVN: r5748