PowerPC32 extended instructions in powerpc_macros

PowerPC32 extended instructions in powerpc_macros

As for PowerPC64, move instructions to the main opcode table.

opcodes/
	* ppc-opc.c (insert_crwn, extract_crwn, insert_elwn, extract_elwn),
	(insert_erwn, extract_erwn, insert_erwb, extract_erwb),
	(insert_cslwn, extract_cslwb, insert_ilwb, extract_ilwn),
	(insert_irwb, extract_irwn, insert_rrwn, extract_rrwn),
	(insert_slwn, extract_slwn, insert_srwn, extract_srwn): New functions.
	(CRWn, ELWn, ERWn, ERWb, CSLWb, CSLWn, ILWn, ILWb, IRWn, IRWb),
	(RRWn, SLWn, SRWn): Define and add powerpc_operands entries.
	(MMB_MASK, MME_MASK, MSHMB_MASK): Define.
	(powerpc_opcodes): Add "inslwi", "insrwi", "rotrwi", "clrrwi",
	"slwi", "srwi", "extlwi", "extrwi", "sli", "sri" and corresponding
	record (ie. dot suffix) forms.
	(powerpc_macros): Delete same.
gas/
	* testsuite/gas/ppc/476.d: Update.
	* testsuite/gas/ppc/simpshft.d: Update.