[llvm] [AMDGPU] Add folding ISD::SELECT from vXiY into vZi32 with X * Y = Z * 32 (PR #173328)

[Juan Manuel Martinez Caamaño via llvm-commits]

================
@@ -5899,6 +5899,15 @@ class LLVM_ABI TargetLowering : public TargetLoweringBase {
     return true;
   }
 
+  // Return ture if should transform:
----------------
jmmartinez wrote:

```suggestion
  // Return true if should transform:
```

https://github.com/llvm/llvm-project/pull/173328