[X86] Remove AVX512 early out from X86FastISel::X86SelectCmp.

This shouldn't be needed anymore since i1 isn't a legal type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316912 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed