[X86] Add VCMPSSZrr_Intk and VCMPSDZrr_Intk to isNonFoldablePartialRegisterLoad.

The non-masked versions are already in there. I'm having some
trouble coming up with a way to test this right now. Most load
folding should happen during isel so I'm not sure how to get
peephole pass to do it.

llvm-svn: 363125