fix mojoshader preprocessor issue

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

     float3 rayOriginWS              = float3(0, 0, 0);
     float3 rayDirWS                 = float3(0, 0, 0);
     float mipLevel                  = 0;
-#if DEBUG_DISPLAY
+#ifdef DEBUG_DISPLAY
     int debugMode                   = 0;
 #endif
     float invScreenWeightDistance   = 0;
         rayDirWS                = preLightData.transparentRefractV;
         mipLevel                = preLightData.transparentSSMipLevel;
         invScreenWeightDistance = _SSRefractionInvScreenWeightDistance;
-#if DEBUG_DISPLAY
+#ifdef DEBUG_DISPLAY
         debugMode               = DEBUGLIGHTINGMODE_SCREEN_SPACE_TRACING_REFRACTION;
 #endif
     }
         rayDirWS                = preLightData.iblR;
         mipLevel                = PositivePow(preLightData.iblPerceptualRoughness, 0.8) * uint(max(_ColorPyramidScale.z - 1, 0));
         invScreenWeightDistance = _SSReflectionInvScreenWeightDistance;
-#if DEBUG_DISPLAY
+#ifdef DEBUG_DISPLAY
-#if DEBUG_DISPLAY
+#ifdef DEBUG_DISPLAY
             bool debug              = _DebugLightingMode == debugMode
                 && !any(int2(_MouseClickPixelCoord.xy) - int2(posInput.positionSS));
 #endif
         // Jitter the ray origin to trade some noise instead of banding effect
         ssRayInput.rayOriginWS = rayOriginWS + rayDirWS * SampleBayer4(posInput.positionSS + uint2(_FrameCount, uint(_FrameCount) / 4u)) * 0.1;
         ssRayInput.rayDirWS = rayDirWS;
-#if DEBUG_DISPLAY
+#ifdef DEBUG_DISPLAY
         ssRayInput.debug = debug;
 #endif