[PATCH] Fix invalid redundant extension elimination for rl78 port

[PATCH] Fix invalid redundant extension elimination for rl78 port

	* ree.c (add_removable_extension): Avoid mis-optimizing cases where
	the source/dest of the target extension require a different number of
	hard registers.
	(combine_set_extension): Remove #if 0 code.

Co-Authored-By: Jeff Law <law@redhat.com>
From-SVN: r230785