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/CMakeLists.txt b/src/backends/reference/workloads/CMakeLists.txt
index e94b031..596c099 100644
--- a/src/backends/reference/workloads/CMakeLists.txt
+++ b/src/backends/reference/workloads/CMakeLists.txt
@@ -34,10 +34,8 @@
     Pad.hpp
     Pooling2d.cpp
     Pooling2d.hpp
-    RefActivationFloat32Workload.cpp
-    RefActivationFloat32Workload.hpp
-    RefActivationUint8Workload.cpp
-    RefActivationUint8Workload.hpp
+    RefActivationWorkload.cpp
+    RefActivationWorkload.hpp
     RefBatchNormalizationFloat32Workload.cpp
     RefBatchNormalizationFloat32Workload.hpp
     RefBatchNormalizationUint8Workload.cpp