Support ymm rounding control for Intel AVX10.2

Support ymm rounding control for Intel AVX10.2

In the patch, in order to support ymm rounding for AVX10.2, we derive
evex attribute for all cases instead of only for rc_none to encode U bit.
Also changed some bad_opcode return due to the share of U bit with APX_F.

gas/ChangeLog:

	* config/tc-i386.c
	(cpu_flags_match): Handle AVX10_2.
	(build_evex_prefix): Handle U bit. Derive evex attribute
	for all cases.
	(check_VecOperands): Handle AVX10.2 and ymm roundings.
	* doc/c-i386.texi: Document .avx10.2.
	* testsuite/gas/i386/i386.exp: Run AVX10.2 tests.
	* testsuite/gas/i386/x86-64.exp: Ditto.
	* testsuite/gas/i386/avx10_2-rounding-intel.d: New test.
	* testsuite/gas/i386/avx10_2-rounding-inval.l: Ditto.
	* testsuite/gas/i386/avx10_2-rounding-inval.s: Ditto.
	* testsuite/gas/i386/avx10_2-rounding.d: Ditto.
	* testsuite/gas/i386/avx10_2-rounding.s: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-rounding-intel.d: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-rounding.d: Ditto.
	* testsuite/gas/i386/x86-64-avx10_2-rounding.s: Ditto.

opcodes/ChangeLog:

	* i386-dis.c (struct instr_info): Add U bit.
	(get_valid_dis386): Handle U bit.
	* i386-gen.c (isa_dependencies): Add AVX10.2.
	(cpu_flags): Ditto.
	* i386-init.h: Regenerated.
	* i386-opc.h (CpuAVX10_2): New.
	(i386_cpu_flags): Add cpuavx10_2.
	* i386-opc.tbl: Add rounding to old entries which do not
	permit rounding previously. Also eliminate the redundant
	RegXMM for vcvtps2uqq.
	* i386-tbl.h: Regenerated.