[llvm] [RISCV] Fold vmnot.m of an integer compare into the compare (PR #222553)

[Luke Lau via llvm-commits]

https://github.com/lukel97 commented:

Thanks, can you precommit the tests in this PR into a separate commit so the second commit shows the diffs? See https://llvm.org/docs/InstCombineContributorGuide.html#precommit-tests

https://github.com/llvm/llvm-project/pull/222553