Support Intel AVX10.2 BF16 instructions

Support Intel AVX10.2 BF16 instructions

In this patch, we will support AVX10.2 BF16 instructions. All of them
are new instructions forms. In current documentation, it is still
VSCALEFPBF16, but it will change to VSCALEFNEPBF16 eventually.

In disassembler part, we added %XB to reduce W table pass since all
of them get evex.w=0.

gas/Changelog:

	* testsuite/gas/i386/i386.exp: Add AVX10.2 tests.
	* testsuite/gas/i386/x86-64.exp: Ditto.
	* testsuite/gas/i386/avx10_2-256-bf16-intel.d: New.
	* testsuite/gas/i386/avx10_2-256-bf16.d: Ditto.
	* testsuite/gas/i386/avx10_2-256-bf16.s: Ditto.
	* testsuite/gas/i386/avx10_2-512-bf16-intel.d: Ditto.
	* testsuite/gas/i386/avx10_2-512-bf16.d: Ditto.
	* testsuite/gas/i386/avx10_2-512-bf16.s: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-256-bf16-intel.d: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-256-bf16.d: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-256-bf16.s: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-512-bf16-intel.d: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-512-bf16.d: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-512-bf16.s: Ditto.

opcodes/

	* i386-dis-evex-prefix.h: Update PREFIX_EVEX_0F3A08, PREFIX_EVEX_0F3A26,
	PREFIX_EVEX_0F3A56, PREFIX_EVEX_0F3A66, PREFIX_EVEX_0F3AC2,
	PREFIX_EVEX_MAP5_2F, PREFIX_EVEX_MAP5_51, PREFIX_EVEX_MAP5_58,
	PREFIX_EVEX_MAP5_59, PREFIX_EVEX_MAP5_5C, PREFIX_EVEX_MAP5_5D,
	PREFIX_EVEX_MAP5_5E, PREFIX_EVEX_MAP5_5F.
	Add PREFIX_EVEX_MAP6_2C, PREFIX_EVEX_MAP6_4C, PREFIX_EVEX_MAP6_4E,
	PREFIX_EVEX_MAP6_98, PREFIX_EVEX_MAP6_9A, PREFIX_EVEX_MAP6_9C,
	PREFIX_EVEX_MAP6_9E, PREFIX_EVEX_MAP6_A8, PREFIX_EVEX_MAP6_AA,
	PREFIX_EVEX_MAP6_AC, PREFIX_EVEX_MAP6_AE, PREFIX_EVEX_MAP6_B8,
	PREFIX_EVEX_MAP6_BA, PREFIX_EVEX_MAP6_BC, PREFIX_EVEX_MAP6_BE.
	* i386-dis-evex.h (evex_table): Update PREFIX_EVEX_MAP6_2C,
	PREFIX_EVEX_MAP6_42, PREFIX_EVEX_MAP6_4C, PREFIX_EVEX_MAP6_4E,
	PREFIX_EVEX_MAP6_98, PREFIX_EVEX_MAP6_9A, PREFIX_EVEX_MAP6_9C,
	PREFIX_EVEX_MAP6_9E, PREFIX_EVEX_MAP6_A8, PREFIX_EVEX_MAP6_AA,
	PREFIX_EVEX_MAP6_AC, PREFIX_EVEX_MAP6_AE, PREFIX_EVEX_MAP6_B8,
	PREFIX_EVEX_MAP6_BA, PREFIX_EVEX_MAP6_BC, PREFIX_EVEX_MAP6_BE.
	* i386-dis.c (PREFIX_EVEX_MAP6_2C): New enum.
	(PREFIX_EVEX_MAP6_42): Ditto.
	(PREFIX_EVEX_MAP6_4C): Ditto.
	(PREFIX_EVEX_MAP6_4E): Ditto.
	(PREFIX_EVEX_MAP6_98): Ditto.
	(PREFIX_EVEX_MAP6_9A): Ditto.
	(PREFIX_EVEX_MAP6_9C): Ditto.
	(PREFIX_EVEX_MAP6_9E): Ditto.
	(PREFIX_EVEX_MAP6_A8): Ditto.
	(PREFIX_EVEX_MAP6_AA): Ditto.
	(PREFIX_EVEX_MAP6_AC): Ditto.
	(PREFIX_EVEX_MAP6_AE): Ditto.
	(PREFIX_EVEX_MAP6_B8): Ditto.
	(PREFIX_EVEX_MAP6_BA): Ditto.
	(PREFIX_EVEX_MAP6_BC): Ditto.
	(PREFIX_EVEX_MAP6_BE): Ditto.
	(putop): Handle %XB.
	* i386-opc.tbl: Add AVX10.2 instructions.
	* i386-mnem.h: Regenerated.
	* i386-tbl.h: Ditto.

Co-authored-by: Haochen Jiang <haochen.jiang@intel.com>