IVGCVSW-1900 : CL backend folder structure

* moving backends/ClWorkloads to backends/cl
* and moving pure Cl workload related code to
  backends/cl/workloads

Change-Id: I019a3c6b4da5e7a23074bf03fb057e63199ad129
diff --git a/src/backends/cl/workloads/ClAdditionWorkload.hpp b/src/backends/cl/workloads/ClAdditionWorkload.hpp
new file mode 100644
index 0000000..3e4ee26
--- /dev/null
+++ b/src/backends/cl/workloads/ClAdditionWorkload.hpp
@@ -0,0 +1,31 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <backends/Workload.hpp>
+
+#include <arm_compute/runtime/CL/CLFunctions.h>
+
+namespace armnn
+{
+
+template <armnn::DataType... dataTypes>
+class ClAdditionWorkload : public TypedWorkload<AdditionQueueDescriptor, dataTypes...>
+{
+public:
+    ClAdditionWorkload(const AdditionQueueDescriptor& descriptor, const WorkloadInfo& info);
+
+    void Execute() const override;
+
+private:
+    mutable arm_compute::CLArithmeticAddition m_Layer;
+};
+
+bool ClAdditionValidate(const TensorInfo& input0,
+                        const TensorInfo& input1,
+                        const TensorInfo& output,
+                        std::string* reasonIfUnsupported);
+} //namespace armnn