[llvm] [NVPTX] Cleanup/Refactoring in NVPTX AsmPrinter and RegisterInfo (NFC) (PR #126800)

[Justin Fargnoli via llvm-commits]

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

Overall, this looks like a great change :) Thanks 

https://github.com/llvm/llvm-project/pull/126800