[llvm] [AMDGPU] expand-fp: Change frem expansion criterion (PR #158285)

[Matt Arsenault via llvm-commits]

================
@@ -74,11 +74,54 @@ class FRemExpander {
   /// Constant 1 of type \p ExTy.
   Value *One;
 
+  /// The frem argument/return types that can be expanded by this class.
+  // TODO The expansion could work for other floating point types
----------------
arsenm wrote:

```suggestion
  // TODO: The expansion could work for other floating point types
```

https://github.com/llvm/llvm-project/pull/158285