IVGCVSW-949 Refactor - clean up includes of ClWorkloadUtils.hpp

Move ClWorkloadUtils.hpp into ClWorkloads and reduce the number of places that include it

Change-Id: Iac661be34c185d6208ca75509155b049c24293ca
diff --git a/src/armnn/backends/ClWorkloads/ClLstmFloatWorkload.cpp b/src/armnn/backends/ClWorkloads/ClLstmFloatWorkload.cpp
index 249a861..09a34c2 100644
--- a/src/armnn/backends/ClWorkloads/ClLstmFloatWorkload.cpp
+++ b/src/armnn/backends/ClWorkloads/ClLstmFloatWorkload.cpp
@@ -8,7 +8,10 @@
 #include "backends/CpuTensorHandle.hpp"
 #include "backends/ArmComputeTensorUtils.hpp"
 #include "backends/ClLayerSupport.hpp"
-#include "arm_compute/runtime/CL/functions/CLLSTMLayer.h"
+
+#include <arm_compute/runtime/CL/functions/CLLSTMLayer.h>
+
+#include "ClWorkloadUtils.hpp"
 
 namespace armnn
 {