spu.h (STACK_SAVE_AREA): Use VOIDmode for SAVE_FUNCTION...

spu.h (STACK_SAVE_AREA): Use VOIDmode for SAVE_FUNCTION...

	* spu.h (STACK_SAVE_AREA): Use VOIDmode for SAVE_FUNCTION, SImode
	for SAVE_NONLOCAL and Pmode for any other save level.
	* spu-protos.h (spu_restore_stack_block): Declare.
	* spu.md (save_stack_block): Remove.
	(restore_stack_block): Call spu_restore_stack_block.
	* spu.c (spu_restore_stack_block): New function.
	(spu_expand_epilogue): Remove old comment.

Co-Authored-By: Ben Elliston <bje@au.ibm.com>
From-SVN: r120633