[X86][SSE] Ensure vector partial load/stores use the WriteVecLoad/WriteVecStore scheduler classes

Retag some instructions that were missed when we split off vector load/store/moves - MOVQ/MOVD etc.

Fixes BtVer2/SLM which have different behaviours for GPR stores.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332718 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed