* pa.md (millicode expands): Change operand 3 in the expand
pattern from a clobber of a match_scratch to a clobber of a
match_operand with a register predicate. Make appropriate
change in the generated RTL.
(millicode insns): Clobber a match_operand with a register
predicate instead of a match_scratch expression.
* pa.c (emit_hpdiv_const): Likewise.