Power10 SIMD permute class operations

Power10 SIMD permute class operations

opcodes/
	* ppc-opc.c (insert_imm32, extract_imm32): New functions.
	(insert_xts, extract_xts): New functions.
	(IMM32, UIM3, IX, UIM5, SH3, XTS, P8RR): Define.
	(P_XX4_MASK, P_UXX4_MASK, VSOP, P_VS_MASK, P_VSI_MASK): Define.
	(VXRC_MASK, VXSH_MASK): Define.
	(powerpc_opcodes): Add vinsbvlx, vsldbi, vextdubvlx, vextdubvrx,
	vextduhvlx, vextduhvrx, vextduwvlx, vextduwvrx, vextddvlx,
	vextddvrx, vinshvlx, vinswvlx, vinsw, vinsbvrx, vinshvrx,
	vinswvrx, vinsd, vinsblx, vsrdbi, vinshlx, vinswlx, vinsdlx,
	vinsbrx, vinshrx, vinswrx, vinsdrx, lxvkq.
	(prefix_opcodes): Add xxsplti32dx, xxspltidp, xxspltiw, xxblendvb,
	xxblendvh, xxblendvw, xxblendvd, xxpermx.
gas/
	* testsuite/gas/ppc/simd_perm.d,
	* testsuite/gas/ppc/simd_perm.s: New test.
	* testsuite/gas/ppc/ppc.exp: Run it.