[llvm] [AArch64][ISel] Add clmul to pmullb/t lowering (PR #180568)

[Matthew Devereau via llvm-commits]

MDevereau wrote:

> Given the subtlety in this area, please add tests for streaming mode with and without the ssve_aes option. There are --force-streaming and -force-streaming-compatible command line options so hopefully it's just a case of adding extra RUN lines.

I >think< it's all good now. I've added sme+streaming,sme+streaming+ssve-aes, and sve+aes run lines to the tests.

https://github.com/llvm/llvm-project/pull/180568