i386: Update VexW field for VEX instructions

i386: Update VexW field for VEX instructions

1. Mark VEX.W0 VEX instructions with VexW=1.
2. Mark VEX.W1 VEX instructions with VexW=2.
3. Remove VexW=1 from WIG VEX instructions.

	* i386-opc.tbl: Add VexW=1 to VEX.W0 VEX movd, cvtsi2ss, cvtsi2sd,
	pextrd, pinsrd, vcvtsi2sd, vcvtsi2ss, vmovd, vpextrd and vpinsrd.
	Add VexW=2 to VEX.W1 VEX movd, movq, pextrq, pinsrq, vmod, vmovq,
	vpextrq and vpinsrq.  Remove VexW=1 from WIG VEX movq and vmovq.
	* i386-tbl.h: Regenerated.