IVGCVSW-2291 TILE Operator CL Implementation

 * Added Tile Operator Implementation to CL
 * Added calls to the existing UnitTests
 * Added Documentation

Signed-off-by: Cian McGriskin <cian.mcgriskin@arm.com>
Change-Id: If7d25c7aa669c24e7816e5d445c7a3b9ce6972d4
diff --git a/src/backends/cl/ClWorkloadFactory.cpp b/src/backends/cl/ClWorkloadFactory.cpp
index 7b4e9be..da05f67 100644
--- a/src/backends/cl/ClWorkloadFactory.cpp
+++ b/src/backends/cl/ClWorkloadFactory.cpp
@@ -755,6 +755,11 @@
             auto subtractionQueueDescriptor = PolymorphicDowncast<const SubtractionQueueDescriptor*>(&descriptor);
             return MakeWorkload<ClSubtractionWorkload>(*subtractionQueueDescriptor, info, m_CLCompileContext);
         }
+        case LayerType::Tile:
+        {
+            auto tileQueueDescriptor = PolymorphicDowncast<const TileQueueDescriptor*>(&descriptor);
+            return MakeWorkload<ClTileWorkload>(*tileQueueDescriptor, info, m_CLCompileContext);
+        }
         case LayerType::Transpose :
         {
             auto transposeQueueDescriptor = PolymorphicDowncast<const TransposeQueueDescriptor*>(&descriptor);