rs6000: Delete "wJ" and "wK" constraints

rs6000: Delete "wJ" and "wK" constraints

This replaces "wJ" by "wI", and "wK by "wH", both with isa "p9v".

	* config/rs6000/constraints.md (define_register_constraint "wJ"):
	Delete.
	(define_register_constraint "wK"): Delete.
	* config/rs6000/rs6000.h (enum r6000_reg_class_enum): Delete
	RS6000_CONSTRAINT_wJ and RS6000_CONSTRAINT_wK.
	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Adjust.
	(rs6000_init_hard_regno_mode_ok): Adjust.
	* config/rs6000/rs6000.md: Replace "wJ" constraint by "wI" with "p9v".
	Replace "wK" constraint by "wH" with "p9v".
	* config/rs6000/vsx.md: Ditto.
	* doc/md.texi (Machine Constraints): Adjust.

From-SVN: r271387