Really fix last IA-64 gas testsuite failure.

Really fix last IA-64 gas testsuite failure.
	* gas/ia64/opc-i.d: Change pmin2.u to pmin2.  Change pmax2.u to pmax2.
	Change MLI to MLX.  Switch operands for output matching tbit.z.orcm,
	tbit.z.andcm, tbit.nz.orcm, tbit.nz.andcm, tnat.z.orcm, tnat.z.andcm,
	tnat.nz.orcm, tnat.nz.andcm inputs.
	* gas/ia64/opc-i.pl: Insert padding nops before last dep.
	* gas/ia64/opc-i.s: Regenerate.