[X86][NFC] Remove class (VEX/EVEX/XOP)_4V and add class VVVV
`VEX_4V` does not look simpler than `VEX, VVVV`. It's kind of confusing
b/c classes like `VEX_L`, `VEX_LIG` do not imply `VEX` but it does.
For APX, we have promote EVEX, NDD, NF and NDD_NF instructions. All of
the 4 variants are in EVEX space and NDD/NDD_NF set the VVVV fields.
To extract the common fields (e.g EVEX) into a class and set VVVV
conditionally, we need VVVV to not imply other prefixes.
GitOrigin-RevId: 62d8ae0a1e7b80a91dc579dc22b335bb22ed07f8
8 files changed
