IVGCVSW-2071 : remove GetCompute() from the WorkloadFactory interface

Change-Id: I44a9d26d1a5d876d381aee4c6450af62811d0dbb
diff --git a/src/backends/cl/ClWorkloadFactory.hpp b/src/backends/cl/ClWorkloadFactory.hpp
index 1441b71..ba7cf69 100644
--- a/src/backends/cl/ClWorkloadFactory.hpp
+++ b/src/backends/cl/ClWorkloadFactory.hpp
@@ -19,7 +19,7 @@
 public:
     ClWorkloadFactory();
 
-    virtual Compute GetCompute() const override { return Compute::GpuAcc; }
+    const BackendId& GetBackendId() const override;
 
     static bool IsLayerSupported(const Layer& layer,
                                  Optional<DataType> dataType,