AVX-512. Extend `perm' insn patterns.

gcc/
	* config/i386/sse.md
	(define_expand "<avx2_avx512f>_perm<mode>"): Rename to ...
	(define_expand "<avx2_avx512>_perm<mode>"): ... this.
	(define_expand "avx512f_perm<mode>_mask"): Rename to ...
	(define_expand "<avx512>_perm<mode>_mask"): ... this.
	Use VI8F_256_512 mode iterator.
	(define_insn "<avx2_avx512f>_perm<mode>_1<mask_name>"): Rename to ...
	(define_insn "<avx2_avx512>_perm<mode>_1<mask_name>"): ... this.

Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com>
Co-Authored-By: Anna Tikhonova <anna.tikhonova@intel.com>
Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com>
Co-Authored-By: Ilya Verbin <ilya.verbin@intel.com>
Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com>
From-SVN: r215590