Initial support for AVX10.2

Initial support for AVX10.2

gcc/ChangeLog:

	* common/config/i386/cpuinfo.h (get_available_features): Handle
	avx10.2.
	* common/config/i386/i386-common.cc
	(OPTION_MASK_ISA2_AVX10_2_256_SET): New.
	(OPTION_MASK_ISA2_AVX10_2_512_SET): Ditto.
	(OPTION_MASK_ISA2_AVX10_1_256_UNSET):
	Add OPTION_MASK_ISA2_AVX10_2_256_UNSET.
	(OPTION_MASK_ISA2_AVX10_1_512_UNSET):
	Add OPTION_MASK_ISA2_AVX10_2_512_UNSET.
	(OPTION_MASK_ISA2_AVX10_2_256_UNSET): New.
	(OPTION_MASK_ISA2_AVX10_2_512_UNSET): Ditto.
	(ix86_handle_option): Handle avx10.2-256 and avx10.2-512.
	* common/config/i386/i386-cpuinfo.h (enum processor_features):
	Add FEATURE_AVX10_2_256 and FEATURE_AVX10_2_512.
	* common/config/i386/i386-isas.h: Add ISA_NAMES_TABLE_ENTRY for
	avx10.2-256 and avx10.2-512.
	* config/i386/i386-c.cc (ix86_target_macros_internal): Define
	__AVX10_2_256__ and __AVX10_2_512__.
	* config/i386/i386-isa.def (AVX10_2): Add DEF_PTA(AVX10_2_256)
	and DEF_PTA(AVX10_2_512).
	* config/i386/i386-options.cc (isa2_opts): Add -mavx10.2-256 and
	-mavx10.2-512.
	(ix86_valid_target_attribute_inner_p): Handle avx10.2-256 and
	avx10.2-512.
	* config/i386/i386.opt: Add option -mavx10.2, -mavx10.2-256 and
	-mavx10.2-512.
	* config/i386/i386.opt.urls: Regenerated.
	* doc/extend.texi: Document avx10.2, avx10.2-256 and avx10.2-512.
	* doc/invoke.texi: Document -mavx10.2, -mavx10.2-256 and
	-mavx10.2-512.
	* doc/sourcebuild.texi: Document target avx10.2, avx10.2-256,
	avx10.2-512.

gcc/testsuite/ChangeLog:

	* g++.dg/other/i386-2.C: Ditto.
	* g++.dg/other/i386-3.C: Ditto.
	* gcc.target/i386/sse-12.c: Ditto.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Ditto.
	* gcc.target/i386/sse-23.c: Ditto.