GPU TPC: add missing header in GPUO2InterfaceUtils.cxx

Author: ehellbar

GPU/GPUTracking/Interface/GPUO2InterfaceUtils.cxx

@@ -26,7 +26,8 @@
 #include "TPCBase/CRU.h"
 #include "TPCBase/RDHUtils.h"
 #include "DataFormatsTPC/ZeroSuppression.h"
-#include <gsl/span>
+#include "GPUTPCClusterOccupancyMap.h" 
+#include < gsl / span>
 
 using namespace o2::gpu;