IVGCVSW-2982 Refactor reference Activation workload

Change-Id: Ia3b9a56787cc68822a3c1635de82e03ecc0aae27
Signed-off-by: Nattapat Chaimanowong <nattapat.chaimanowong@arm.com>
diff --git a/src/backends/reference/workloads/RefActivationWorkload.hpp b/src/backends/reference/workloads/RefActivationWorkload.hpp
new file mode 100644
index 0000000..a3b001e
--- /dev/null
+++ b/src/backends/reference/workloads/RefActivationWorkload.hpp
@@ -0,0 +1,21 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <backendsCommon/Workload.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+
+namespace armnn
+{
+
+class RefActivationWorkload : public BaseWorkload<ActivationQueueDescriptor>
+{
+public:
+    using BaseWorkload<ActivationQueueDescriptor>::BaseWorkload;
+    virtual void Execute() const override;
+};
+
+} //namespace armnn