AVX-512: Added intrinsics for vcvt, vcvtt, vrndscale, vcmp
Printing rounding control.
Enncoding for EVEX_RC (rounding control).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198277 91177308-0d34-0410-b5e6-96231b3b80d8
Remove need for MODIFIER_OPCODE in the disassembler tables. AddRegFrms are really more like OrRegFrm so we don't need a difference since we can just mask bits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198278 91177308-0d34-0410-b5e6-96231b3b80d8