x86: Support Intel UINTR

gas/

	* NEWS: Add Intel UINTR.
	* config/tc-i386.c (cpu_arch): Add .uintr.
	(cpu_noarch): Likewise.
	* doc/c-i386.texi: Document .uintr and nouintr.
	* testsuite/gas/i386/i386.exp: Run UINTR tests.
	* testsuite/gas/i386/x86-64-uintr.d: Likewise.
	* testsuite/gas/i386/x86-64-uintr.s: Likewise.

opcodes/

	* i386-dis.c (enum): Add
	PREFIX_MOD_3_0F01_REG_5_RM_4,
	PREFIX_MOD_3_0F01_REG_5_RM_5,
	PREFIX_MOD_3_0F01_REG_5_RM_6,
	PREFIX_MOD_3_0F01_REG_5_RM_7,
	X86_64_0F01_REG_5_MOD_3_RM_4_PREFIX_1,
	X86_64_0F01_REG_5_MOD_3_RM_5_PREFIX_1,
	X86_64_0F01_REG_5_MOD_3_RM_6_PREFIX_1,
	X86_64_0F01_REG_5_MOD_3_RM_7_PREFIX_1,
	X86_64_0FC7_REG_6_MOD_3_PREFIX_1.
	(prefix_table): New instructions (see prefixes above).
	(rm_table): Likewise
	* i386-gen.c (cpu_flag_init): Add CPU_UINTR_FLAGS,
	CPU_ANY_UINTR_FLAGS.
	(cpu_flags): Add CpuUINTR.
	* i386-opc.h (enum): Add CpuUINTR.
	(i386_cpu_flags): Add cpuuintr.
	* i386-opc.tbl: Add UINTR insns.
	* i386-init.h: Regenerate.
	* i386-tbl.h: Likewise.