renamed and added the pragma multi_compile for decals to Lit shaders

com.unity.render-pipelines.high-definition/HDRP/Material/Decal/Decal.hlsl

         DBufferType2 MERGE_NAME(NAME, 2) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 2), unCoord2); \
         DBufferType3 MERGE_NAME(NAME, 3) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 3), unCoord2);
 
-#ifdef _PER_CHANNEL_MASK
+#ifdef _DECALS_PER_CHANNEL_MASK
 	#define ENCODE_INTO_DBUFFER(DECAL_SURFACE_DATA, NAME) EncodeIntoDBuffer(DECAL_SURFACE_DATA, MERGE_NAME(NAME,0), MERGE_NAME(NAME,1), MERGE_NAME(NAME,2), MERGE_NAME(NAME,3))
 	#define DECODE_FROM_DBUFFER(NAME, DECAL_SURFACE_DATA) DecodeFromDBuffer(MERGE_NAME(NAME,0), MERGE_NAME(NAME,1), MERGE_NAME(NAME,2), MERGE_NAME(NAME,3), DECAL_SURFACE_DATA)
 #else
                         , out DBufferType0 outDBuffer0
                         , out DBufferType1 outDBuffer1
                         , out DBufferType2 outDBuffer2
-#ifdef _PER_CHANNEL_MASK
+#ifdef _DECALS_PER_CHANNEL_MASK
 						, out DBufferType3 outDBuffer3
 #endif
                         )
     outDBuffer2 = surfaceData.mask;
-#ifdef _PER_CHANNEL_MASK
+#ifdef _DECALS_PER_CHANNEL_MASK
 	outDBuffer3 = surfaceData.MAOSBlend;
 #endif
 }
     , DBufferType1 inDBuffer1
     , DBufferType2 inDBuffer2
-#ifdef _PER_CHANNEL_MASK
+#ifdef _DECALS_PER_CHANNEL_MASK
 	, DBufferType3 inDBuffer3
 #endif
     , out DecalSurfaceData surfaceData
     surfaceData.normalWS.xyz = inDBuffer1.xyz * 2.0f - 1.0f;
     surfaceData.normalWS.w = inDBuffer1.w;
     surfaceData.mask = inDBuffer2;
-#ifdef _PER_CHANNEL_MASK
+#ifdef _DECALS_PER_CHANNEL_MASK
 	surfaceData.MAOSBlend = inDBuffer3;
 #else
 	surfaceData.MAOSBlend = float2(surfaceData.mask.w, surfaceData.mask.w);

com.unity.render-pipelines.high-definition/HDRP/Material/Decal/Decal.shader

 	#pragma shader_feature _MAOS_BLEND_MASK_B
 
     #pragma multi_compile_instancing
-	#pragma multi_compile _ _PER_CHANNEL_MASK
+	#pragma multi_compile _ _DECALS_PER_CHANNEL_MASK
     //-------------------------------------------------------------------------------------
     // Define
     //-------------------------------------------------------------------------------------

com.unity.render-pipelines.high-definition/HDRP/Material/LayeredLit/LayeredLit.shader

     // enable dithering LOD crossfade
     #pragma multi_compile _ LOD_FADE_CROSSFADE
 
+	// decal 3RT or 4RT toggle
+	#pragma multi_compile _ _DECALS_PER_CHANNEL_MASK
+
     //enable GPU instancing support
     #pragma multi_compile_instancing
 

com.unity.render-pipelines.high-definition/HDRP/Material/LayeredLit/LayeredLitTessellation.shader

     // enable dithering LOD crossfade
     #pragma multi_compile _ LOD_FADE_CROSSFADE
 
+	// decal 3RT or 4RT toggle
+	#pragma multi_compile _ _DECALS_PER_CHANNEL_MASK
+
     // enable GPU instancing
     #pragma multi_compile_instancing
 

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/Lit.shader

     // enable dithering LOD crossfade
     #pragma multi_compile _ LOD_FADE_CROSSFADE
 
+	// decal 3RT or 4RT toggle
+	#pragma multi_compile _ _DECALS_PER_CHANNEL_MASK
+
     //enable GPU instancing support
     #pragma multi_compile_instancing
 

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/LitTessellation.shader

     // enable dithering LOD crossfade
     #pragma multi_compile _ LOD_FADE_CROSSFADE
 
+	// decal 3RT or 4RT toggle
+	#pragma multi_compile _ _DECALS_PER_CHANNEL_MASK
+
     //enable GPU instancing support
     #pragma multi_compile_instancing
 

com.unity.render-pipelines.high-definition/HDRP/RenderPipeline/HDRenderPipeline.cs

                     renderQueueRange = HDRenderQueue.k_RenderQueue_AllOpaque
                 };
 
-                CoreUtils.SetKeyword(cmd, "_PER_CHANNEL_MASK", m_Asset.GetRenderPipelineSettings().decalSettings.perChannelMask);
+                CoreUtils.SetKeyword(cmd, "_DECALS_PER_CHANNEL_MASK", m_Asset.GetRenderPipelineSettings().decalSettings.perChannelMask);
 
                 renderContext.DrawRenderers(cullResults.visibleRenderers, ref drawSettings, filterRenderersSettings);
                 DecalSystem.instance.RenderIntoDBuffer(cmd);