[X86] Remove i128 type from FR128 regclass.

i128 isn't a legal type in our x86 implementation today. So remove this and the few patterns that used it until it becomes necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336889 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed