[llvm] [CodeGen] [X86] Fix issues with v4i1 instruction selection

Summary:
Fixes issue
https://bugs.llvm.org/show_bug.cgi?id=45995

Reviewers: mehdi_amini, nicolasvasilache, reidtatge, craig.topper, ftynse, bkramer

Reviewed By: craig.topper

Subscribers: RKSimon, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D80231