Fix latest issue, working version

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Lit/Lit.hlsl

 }
 
 // Note: this modify the parameter perceptualRoughness and fresnel0, so they need to be setup
-void FillMaterialIdClearCoatData(float3 coatMask, inout BSDFData bsdfData)
+void FillMaterialIdClearCoatData(float coatMask, inout BSDFData bsdfData)
 {
     bsdfData.coatMask = coatMask;
     float ieta = lerp(1.0, CLEAR_COAT_IETA, bsdfData.coatMask);
     }
     else if (bsdfData.materialId == MATERIALID_LIT_CLEAR_COAT && HasMaterialFeatureFlag(MATERIALFEATUREFLAGS_LIT_CLEAR_COAT))
     {
-        float coatMask;
-        UnpackFloatInt8bit(inGBuffer2.a, 16.0, bsdfData.coatMask, metallic15);
+        UnpackFloatInt8bit(inGBuffer2.a, 16.0, coatMask, metallic15);
         metallic = metallic15 / 15.0;
     }