[X86] Revert r329251-329254

It's failing on the bots and I'm not sure why.

This reverts:

[X86] Synchronize the SchedRW on some EVEX instructions with their VEX equivalents.
[X86] Use WriteFShuffle256 for VEXTRACTF128 to be consistent with VEXTRACTI128 which uses WriteShuffle256.
[X86] Remove some InstRWs for plain store instructions on Sandy Bridge.
[X86] Auto-generate complete checks. NFC

llvm-svn: 329256