[X86] Stop creating CMOV nodes with a second MVT::Glue result

[X86] Stop creating CMOV nodes with a second MVT::Glue result

Summary: We seem to inconsistently create CMOV nodes some with a Glue result and some without. But I can't find any cases that use the Glue result. So I've tried to remove all the place that did this.

Reviewers: RKSimon, spatel, zvi

Reviewed By: RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D38664

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315686 91177308-0d34-0410-b5e6-96231b3b80d8