GPU TPC: add missing header in GPUO2InterfaceUtils.cxx

Author: ehellbar

GPU/GPUTracking/Interface/GPUO2InterfaceUtils.cxx

@@ -26,6 +26,7 @@
 #include "TPCBase/CRU.h"
 #include "TPCBase/RDHUtils.h"
 #include "DataFormatsTPC/ZeroSuppression.h"
+#include "GPUTPCClusterOccupancyMap.h" 
 #include <gsl/span>
 
 using namespace o2::gpu;