Power10 VSX Mask Manipulation Operations

Power10 VSX Mask Manipulation Operations

opcodes/
	* ppc-opc.c (MP, VXVAM_MASK): Define.
	(VXVAPS_MASK): Use VXVA_MASK.
	(powerpc_opcodes): Add mtvsrbmi, vexpandbm, vexpandhm, vexpandwm,
	vexpanddm, vexpandqm, vextractbm, vextracthm, vextractwm,
	vextractdm, vextractqm, mtvsrbm, mtvsrhm, mtvsrwm, mtvsrdm, mtvsrqm,
	vcntmbb, vcntmbh, vcntmbw, vcntmbd.
gas/
	* testsuite/gas/ppc/maskmanip.d,
	* testsuite/gas/ppc/maskmanip.s: New test.
	* testsuite/gas/ppc/ppc.exp: Run it.