IVGCVSW-2982 Refactor reference Activation workload

Change-Id: Ia3b9a56787cc68822a3c1635de82e03ecc0aae27
Signed-off-by: Nattapat Chaimanowong <nattapat.chaimanowong@arm.com>
diff --git a/src/backends/reference/backend.mk b/src/backends/reference/backend.mk
index e74e853..06459ed 100644
--- a/src/backends/reference/backend.mk
+++ b/src/backends/reference/backend.mk
@@ -24,8 +24,7 @@
         workloads/Merger.cpp \
         workloads/Pad.cpp \
         workloads/Pooling2d.cpp \
-        workloads/RefActivationFloat32Workload.cpp \
-        workloads/RefActivationUint8Workload.cpp \
+        workloads/RefActivationWorkload.cpp \
         workloads/RefBatchNormalizationFloat32Workload.cpp \
         workloads/RefBatchNormalizationUint8Workload.cpp \
         workloads/RefBatchToSpaceNdFloat32Workload.cpp \