AVX-512. Add patterns for compress, expand.

AVX-512. Add patterns for compress, expand.

gcc/
	* config/i386/sse.md
	(define_mode_iterator VI48F): New.
	(define_insn "<avx512>_compress<mode>_mask"): Rename from
	"avx512f_compress<mode>_mask" and update mode iterator.
	(define_insn "<avx512>_compressstore<mode>_mask"): Rename from
	"avx512f_compressstore<mode>_mask" and update mode iterator.
	(define_expand "<avx512>_expand<mode>_maskz"): Rename from
	"avx512f_expand<mode>_maskz" and update mode iterator.
	(define_insn "<avx512>_expand<mode>_mask"): Rename from
	"avx512f_expand<mode>_mask" and update mode iterator.

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: r215108