pa.md (sh[123]add patterns): Use register_operand, not shadd_operand.

pa.md (sh[123]add patterns): Use register_operand, not shadd_operand.

	* pa.md (sh[123]add patterns): Use register_operand, not
	shadd_operand.
	(sh[123]add patterns for reload): Special patterns to avoid
	lossage due to reload problems.

From-SVN: r3737