rs6000.c (rs6000_stack_t): Remove toc_save_p, toc_save_offset, toc_size, lr_size.

	* config/rs6000/rs6000.c (rs6000_stack_t): Remove toc_save_p,
	toc_save_offset, toc_size, lr_size.
	(rs6000_stack_info): Use memset rather than bss struct copy to init.
	Test rs6000_ra_ever_killed last in condition setting lr_save_p.
	Adjust for removal of unused rs6000_stack_t fields.
	(debug_stack_info): Adjust.
	(rs6000_ra_ever_killed): Expand FIND_REG_INC_NOTE.  Test for calls
	first, and don't bother checking for set/inc of lr on sibcalls.
	(rs6000_emit_epilogue): Tidy code restoring stack pointer.

From-SVN: r107962