[clang] [clang][CGCUDANV] Unify PointerType members of CGNVCUDARuntime (NFC) (PR #75668)

[Nikita Popov via cfe-commits]

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

LGTM

There are already C-style function signatures in the comments, so I don't see value in keeping separate variable names.

https://github.com/llvm/llvm-project/pull/75668