[llvm] Adding support in llvm-exegesis for Aarch64 for handling FPR64/128, PPR16 and ZPR128 reg class. (PR #127564)

[Sjoerd Meijer via llvm-commits]

https://github.com/sjoerdmeijer approved this pull request.

I think this looks reasonable as a first version and I know you'll continue to work on this, so LGTM.

Please merge this tomorrow morning if there are no objections. 

https://github.com/llvm/llvm-project/pull/127564