[X86] Split WriteVecLogic into XMM and YMM/ZMM scheduler classes

This removes all the WriteVecLogic InstRW overrides.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331258 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed