rs6000: Cleanup of various jump patterns

rs6000: Cleanup of various jump patterns

This cleans up formatting of many jump patterns.  Mostly it is writing
output statements as brace blocks, and deleting default arguments.  It
also makes indentation a little bit more consistent, and uses b%T0
(instead of bctr/blr alternatives) in two more places.

	* config/rs6000/rs6000.md (conditional branch): Clean up formatting.
	Remove empty default arguments.  Use a brace block as output
	statement.
	(conditional return): Ditto.
	(jump): Ditto.
	(indirect_jump): Ditto.  Use b%T0 instead of bctr/blr.
	(tablejump, tablejumpsi, tablejumpdi, *tablejump<mode>_internal1):
	Ditto.
	(group_ending_nop): Ditto.
	(doloop_end): Ditto.
	(ctr<mode>, ctr<mode>_internal1, ctr<mode>_internal2): Ditto.
	(splitters for those): Ditto.

From-SVN: r253532