[x86] fix triple and regenerate checks for psubus; NFC

Patch by Yulia Koval!

Differential Revision: https://reviews.llvm.org/D37523


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312662 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed