[llvm] [NVPTX] Lower -1/x to neg.f64(rcp.rn.f64) instead of fdiv (PR #98343)

[Rajat Bajpai via llvm-commits]

rajatbajpai wrote:

Thanks @durga4github for merging this change, and everyone else for taking the time to review this change.

https://github.com/llvm/llvm-project/pull/98343