[llvm] [AMDGPU] Use `v_cvt_pk_*` instructions for i16_f32 saturated conversions (PR #202680)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index 521304d48..9be0e432d 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -3946,7 +3946,8 @@ SDValue AMDGPUTargetLowering::LowerFP_TO_INT_SAT(const SDValue Op,
       (SrcVT == MVT::f32 || SrcVT == MVT::f64))
     return Op;
 
-  if (DstVT == MVT::i16 && SatWidth == DstWidth && (SrcVT == MVT::f16 || SrcVT == MVT::f32))
+  if (DstVT == MVT::i16 && SatWidth == DstWidth &&
+      (SrcVT == MVT::f16 || SrcVT == MVT::f32))
     return Op;
 
   // Perform all saturation at selected width (i16 or i32) and truncate

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https://github.com/llvm/llvm-project/pull/202680