[llvm] [LoopIdiomRecognize] Enable clmul optimization for CRC loops (PR #203405)

[Sean Clarke via llvm-commits]

xarkenz wrote:

Once https://github.com/llvm/llvm-project/pull/207231 is merged, the edge case handling can be removed in `optimizeCRCLoopUsingClmul`.

https://github.com/llvm/llvm-project/pull/203405