IVGCVSW-2398 Add no-op factory implementations for all backends for the
Equal operation

 * Add QueueDescriptor in WorkloadData.hpp
 * Add CreateEqual function in WorkloadFactory.hpp
 * Added stub implementation of the CreateEqual function in RefWorkloadFactory,
   NeonWorkloadFactory and ClWorkloadFactory

Change-Id: Iec6dc2f989c67fa6f0c32cfb93508995c8580783
diff --git a/src/backends/cl/ClWorkloadFactory.cpp b/src/backends/cl/ClWorkloadFactory.cpp
index ebd957b..16ca2e6 100644
--- a/src/backends/cl/ClWorkloadFactory.cpp
+++ b/src/backends/cl/ClWorkloadFactory.cpp
@@ -314,6 +314,12 @@
     return MakeWorkload<ClPadWorkload>(descriptor, info);
 }
 
+std::unique_ptr<IWorkload> ClWorkloadFactory::CreateEqual(const EqualQueueDescriptor& descriptor,
+                                                               const WorkloadInfo& info) const
+{
+    return MakeWorkload<NullWorkload, NullWorkload>(descriptor, info);
+}
+
 std::unique_ptr<IWorkload> ClWorkloadFactory::CreateBatchToSpaceNd(const BatchToSpaceNdQueueDescriptor& descriptor,
                                                                    const WorkloadInfo& info) const
 {