i386: Change mnemonics from VCOMSBF16 to VCOMISBF16

i386: Change mnemonics from VCOMSBF16 to VCOMISBF16

Besides mnemonics change, this patch also use the compare
pattern instead of UNSPEC.

gcc/ChangeLog:

	PR target/118270
	* config/i386/avx10_2bf16intrin.h: Change intrin and builtin
	name according to new mnemonics.
	* config/i386/i386-builtin.def (BDESC): Ditto.
	* config/i386/i386-expand.cc
	(ix86_expand_fp_compare): Adjust comments.
	(ix86_expand_builtin): Adjust switch case.
	* config/i386/i386.md (cmpibf): Change instruction name output.
	* config/i386/sse.md (UNSPEC_VCOMSBF16): Removed.
	(avx10_2_comisbf16_v8bf): New.
	(avx10_2_comsbf16_v8bf): Removed.

gcc/testsuite/ChangeLog:

	PR target/118270
	* gcc.target/i386/avx10_2-comibf-1.c: Adjust asm check.
	* gcc.target/i386/avx10_2-comibf-3.c: Ditto.
	* gcc.target/i386/avx10_2-vcomsbf16-1.c: Move to...
	* gcc.target/i386/avx10_2-vcomisbf16-1.c: ...here.
	Adjust output and intrin call.
	* gcc.target/i386/avx10_2-vcomsbf16-2.c: Move to...
	* gcc.target/i386/avx10_2-vcomisbf16-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/pr117495.c: Adjust asm check.