gas/

	* config/tc-ppc.c (md_show_usage): Add -mpwr4, -mpwr5, -mpwr5x,
	-mpwr6 and -mpwr7.

opcodes/
	* ppc-dis.c (ppc_opts): Add "pwr4", "pwr5", "pwr5x", "pwr6"
	and "pwr7".  Move "a2" into alphabetical order.