Convert some EVTs to MVTs where only a SimpleValueType is needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222109 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222110 91177308-0d34-0410-b5e6-96231b3b80d8