PowerPC: Add new xxmr and xxlnot extended mnemonics

opcodes/
	* ppc-opc.c (powerpc_opcodes) <xxmr, xxlnot>: New extended mnemonics.

gas/
	* testsuite/gas/ppc/vsx.d <xxmr, xxlnot>: Add tests.
	* testsuite/gas/ppc/vsx.s: Likewise.
5 files changed