[llvm] [NVPTX] Add patterns for fma.relu.{f16|f16x2|bf16|bf16x2} (PR #114977)

[Artem Belevich via llvm-commits]

https://github.com/Artem-B approved this pull request.

Nice. Please hold off on merging the patch till Monday, so if we find issues, there's someone around to deal with that.

https://github.com/llvm/llvm-project/pull/114977