Enable Intel AVX512_VBMI2 instructions.

Enable Intel AVX512_VBMI2 instructions.

Intel has disclosed a set of new instructions. The spec is
https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf

gas/

	* config/tc-i386.c (cpu_arch): Add .avx512_vbmi2.
	(cpu_noarch): noavx512_vbmi2.
	* doc/c-i386.texi: Document .avx512_vbmi2, noavx512_vbmi2.
	* testsuite/gas/i386/i386.exp: Add AVX512_VBMI2 tests.
	* testsuite/gas/i386/avx512vbmi2-intel.d: New test.
	* testsuite/gas/i386/avx512vbmi2.d: Likewise.
	* testsuite/gas/i386/avx512vbmi2.s: Likewise.
	* testsuite/gas/i386/avx512vbmi2_vl-intel.d: Likewise.
	* testsuite/gas/i386/avx512vbmi2_vl.d: Likewise.
	* testsuite/gas/i386/avx512vbmi2_vl.s: Likewise.
	* testsuite/gas/i386/x86-64-avx512vbmi2-intel.d: Likewise.
	* testsuite/gas/i386/x86-64-avx512vbmi2.d: Likewise.
	* testsuite/gas/i386/x86-64-avx512vbmi2.s: Likewise.
	* testsuite/gas/i386/x86-64-avx512vbmi2_vl-intel.d: Likewise.
	* testsuite/gas/i386/x86-64-avx512vbmi2_vl.d: Likewise.
	* testsuite/gas/i386/x86-64-avx512vbmi2_vl.s: Likewise.

opcodes/

	* i386-dis.c (enum): Add b_scalar_mode, w_scalar_mode.
	Define EXbScalar and EXwScalar for OP_EX.
	(enum): Add PREFIX_EVEX_0F3862, PREFIX_EVEX_0F3863,
	PREFIX_EVEX_0F3870, PREFIX_EVEX_0F3871, PREFIX_EVEX_0F3872,
	PREFIX_EVEX_0F3873, PREFIX_EVEX_0F3A70, PREFIX_EVEX_0F3A71,
	PREFIX_EVEX_0F3A72, PREFIX_EVEX_0F3A73.
	(enum): Add EVEX_W_0F3862_P_2, EVEX_W_0F3863_P_2,
	EVEX_W_0F3870_P_2, EVEX_W_0F3871_P_2, EVEX_W_0F3872_P_2,
	EVEX_W_0F3873_P_2, EVEX_W_0F3A70_P_2, EVEX_W_0F3A71_P_2,
	EVEX_W_0F3A72_P_2, EVEX_W_0F3A73_P_2.
	(intel_operand_size): Handle b_scalar_mode and w_scalar_mode.
	(OP_E_memory): Likewise.
	* i386-dis-evex.h: Updated.
	* i386-gen.c (cpu_flag_init): Add CPU_AVX512_VBMI2,
	CPU_ANY_AVX512_VBMI2_FLAGS. Update CPU_ANY_AVX512F_FLAGS.
	(cpu_flags): Add CpuAVX512_VBMI2.
	* i386-opc.h (enum): Add CpuAVX512_VBMI2.
	(i386_cpu_flags): Add cpuavx512_vbmi2.
	* i386-opc.tbl: Add Intel AVX512_VBMI2 instructions.
	* i386-init.h: Regenerate.
	* i386-tbl.h: Likewise.