Switch to dense math names for all MMA operations.

Switch to dense math names for all MMA operations.

2022-10-26   Michael Meissner  <meissner@linux.ibm.com>

gcc/

	* config/rs6000/mma.md (vvi4i4i8_dm): New int attribute.
	(avvi4i4i8_dm): Likewise.
	(vvi4i4i2_dm): Likewise.
	(avvi4i4i2_dm): Likewise.
	(vvi4i4_dm): Likewise.
	(avvi4i4_dm): Likewise.
	(pvi4i2_dm): Likewise.
	(apvi4i2_dm): Likewise.
	(vvi4i4i4_dm): Likewise.
	(avvi4i4i4_dm): Likewise.
	(mma_<vv>): Add support for running on DMF systems, generating the dense
	math instruction and using the dense math accumulator.
	(mma_<avv>): Likewise.
	(mma_<pv>): Likewise.
	(mma_<apv>): Likewise.
	(mma_<vvi4i4i8>): Likewise.
	(mma_<avvi4i4i8>): Likewise.
	(mma_<vvi4i4i2>): Likewise.
	(mma_<avvi4i4i2>): Likewise.
	(mma_<vvi4i4>): Likewise.
	(mma_<avvi4i4): Likewise.
	(mma_<pvi4i2>): Likewise.
	(mma_<apvi4i2): Likewise.
	(mma_<vvi4i4i4>): Likewise.
	(mma_<avvi4i4i4>): Likewise.