HDRP: Fix perf regression issue introduce with lightlayers

com.unity.render-pipelines.high-definition/HDRP/Lighting/LightLoop/Deferred.compute

 
     BSDFData bsdfData;
     BuiltinData builtinData;
-    DECODE_FROM_GBUFFER(posInput.positionSS, UINT_MAX, bsdfData, builtinData);
+    DECODE_FROM_GBUFFER(posInput.positionSS, featureFlags, bsdfData, builtinData);
 
     PreLightData preLightData = GetPreLightData(V, posInput, bsdfData);