[llvm] [AMDGPU] selecting v_sat_pk instruction, version 2 (PR #123297)

[Pierre van Houtryve via llvm-commits]

================
@@ -824,6 +824,25 @@ SITargetLowering::SITargetLowering(const TargetMachine &TM,
                          {MVT::v4f32, MVT::v8f32, MVT::v16f32, MVT::v32f32},
                          Custom);
     }
+
+    // True 16 instruction is current not supported
+    // FIXME: Add support for true 16 when supported
----------------
Pierre-vh wrote:

```suggestion
    // FIXME: Add support 
```

https://github.com/llvm/llvm-project/pull/123297