[clang] [llvm] [mlir] [clang][NVPTX][MLIR][NVVM] Add overloaded fadd intrinsics (PR #217336)

[Erich Keane via cfe-commits]

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

The clang side looks fine to me.  Thanks for doing CIR as well!

https://github.com/llvm/llvm-project/pull/217336