[llvm] AMDGPU: Legalize fminimum and fmaximum f32 for gfx950 (PR #117634)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Nov 26, 2:41 PM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/117634).


https://github.com/llvm/llvm-project/pull/117634