i386: Allow 64 bit mask register for -mno-evex512

i386: Allow 64 bit mask register for -mno-evex512

gcc/ChangeLog:

	* config/i386/avx512bwintrin.h: Allow 64 bit mask intrin usage
	for -mno-evex512.
	* config/i386/i386-builtin.def: Remove OPTION_MASK_ISA2_EVEX512
	for 64 bit mask builtins.
	* config/i386/i386.cc (ix86_hard_regno_mode_ok): Allow 64 bit
	mask register for -mno-evex512.
	* config/i386/i386.md (SWI1248_AVX512BWDQ_64): Remove
	TARGET_EVEX512.
	(*zero_extendsidi2): Change isa attribute to avx512bw.
	(kmov_isa): Ditto.
	(*anddi_1): Ditto.
	(*andn<mode>_1): Remove TARGET_EVEX512.
	(*one_cmplsi2_1_zext): Change isa attribute to avx512bw.
	(*ashl<mode>3_1): Ditto.
	(*lshr<mode>3_1): Ditto.
	* config/i386/sse.md (SWI1248_AVX512BWDQ): Remove TARGET_EVEX512.
	(SWI1248_AVX512BW): Ditto.
	(SWI1248_AVX512BWDQ2): Ditto.
	(*knotsi_1_zext): Ditto.
	(kunpckdi): Ditto.
	(SWI24_MASK): Removed.
	(vec_pack_trunc_<mode>): Change iterator from SWI24_MASK to SWI24.
	(vec_unpacks_lo_di): Remove TARGET_EVEX512.
	(SWI48x_MASK): Removed.
	(vec_unpacks_hi_<mode>): Change iterator from SWI48x_MASK to SWI48x.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx10_1-6.c: Remove check for errors.
	* gcc.target/i386/noevex512-2.c: Diito.