Fusion patterns for add-logical/logical-add

Fusion patterns for add-logical/logical-add

This patch modifies the function in genfusion.pl for generating
the logical-logical patterns so that it can also generate the
add-logical and logical-add patterns which are very similar.

gcc/ChangeLog:
	* config/rs6000/genfusion.pl (gen_logical_addsubf): Refactor to
	add generation of logical-add and add-logical fusion pairs.
	* config/rs6000/rs6000-cpus.def: Add new fusion to ISA 3.1 mask
	and powerpc mask.
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Turn on
	logical-add and add-logical fusion by default.
	* config/rs6000/rs6000.opt: Add -mpower10-fusion-logical-add and
	-mpower10-fusion-add-logical options.
	* config/rs6000/fusion.md: Regenerate file.

gcc/testsuite/ChangeLog:
	* gcc.target/powerpc/fusion-p10-logadd.c: New file.