[InstCombine] clean up foldICmpBinOpEqualityWithConstant / foldICmpIntrinsicWithConstant ; NFC

1. Rename variables to be consistent with related/preceding code (may want to reorganize).
2. Fix comments/formatting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281140 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed