rs6000: Clean up rs6000_stack_info a bit

- Rename "info_ptr" to "info", as in all other routines;
- Don't set fields to 0, the whole struct already is set to 0;
- Fix formatting a bit.


	* config/rs6000/rs6000.c (compute_save_world_info): Rename info_ptr
	to info.  Don't initialize separate fields to 0.  Clean up
	formatting a bit.

From-SVN: r235606

gcc/ChangeLog

+2016-04-28  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000.c (compute_save_world_info): Rename info_ptr
+	to info.  Don't initialize separate fields to 0.  Clean up
+	formatting a bit.
+
 2016-04-28  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (peephole2s for operations with memory inputs):