[llvm] AMDGPU: Fold more scalar operations on frame index to VALU (PR #115059)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Nov 7, 10:00 PM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/115059).


https://github.com/llvm/llvm-project/pull/115059