Support Intel SM4 EVEX instructions

Support Intel SM4 EVEX instructions

gcc/ChangeLog:

	* config/i386/i386-builtin-types.def:
	Add DEF_FUNCTION_TYPE (V16SI, V16SI, V16SI).
	* config/i386/i386-builtin.def (BDESC): Add new builtins.
	* config/i386/i386-expand.cc (ix86_expand_args_builtin): Handle
	V16SI_FTYPE_V16SI_V16SI.
	* config/i386/sm4intrin.h: Add zmm insns.
	* config/i386/sse.md (vsm4key4_<mode>): Add EVEX pattern.
	(vsm4rnds4_<mode>): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/sm4-check.h: Add zmm test.
	* gcc.target/i386/sm4-avx10_2-1.c: New test.
	* gcc.target/i386/sm4-avx10_2-512-1.c: Ditto.
	* gcc.target/i386/sm4key4-avx10_2-512-2.c: Ditto.
	* gcc.target/i386/sm4rnds4-avx10_2-512-2.c: Ditto.