[llvm] [Mips] Fix cttz.i32 fails to lower on mips16 (PR #179633)

[Craig Topper via llvm-commits]

topperc wrote:

Please not force push PRs unless necessary. https://llvm.org/docs/GitHub.html#rebasing-pull-requests-and-force-pushes

https://github.com/llvm/llvm-project/pull/179633