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/ClActivationFloatWorkload.hpp b/src/backends/cl/workloads/ClActivationFloatWorkload.hpp
new file mode 100644
index 0000000..cb560a7
--- /dev/null
+++ b/src/backends/cl/workloads/ClActivationFloatWorkload.hpp
@@ -0,0 +1,29 @@
+//
+// 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
+{
+arm_compute::Status ClActivationWorkloadValidate(const TensorInfo& input,
+                                                 const TensorInfo& output,
+                                                 const ActivationDescriptor& descriptor);
+
+// Activation layer execution.
+class ClActivationFloatWorkload : public FloatWorkload<ActivationQueueDescriptor>
+{
+public:
+    ClActivationFloatWorkload(const ActivationQueueDescriptor& descriptor, const WorkloadInfo& info);
+    void Execute() const override;
+
+private:
+    mutable arm_compute::CLActivationLayer m_ActivationLayer;
+};
+
+} //namespace armnn