AVX-512. 60/n. Update 128bit ashrv insn pattern.

AVX-512. 60/n. Update 128bit ashrv insn pattern.

gcc/
	* config/i386/sse.md
	(define_mode_iterator VI128_128 [V16QI V8HI V2DI]): Delete.
	(define_expand "vashr<mode>3<mask_name>"): Add masking,
	use VI12_128 mode iterator.
	(define_expand "ashrv2di3<mask_name>"): New.

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: r216178