IVGCVSW-2253 Add maximum layer and corresponding no-op factory implementation

Change-Id: I8964f5e8978c2d2a07734a381e3f7c656c22456a
diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index 32464f7..57949fb 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -507,6 +507,11 @@
     return m_Graph->AddLayer<SplitterLayer>(splitterDescriptor, name);
 }
 
+IConnectableLayer* Network::AddMaximumLayer(const char* name)
+{
+    return m_Graph->AddLayer<MaximumLayer>(name);
+}
+
 IConnectableLayer* Network::AddMergerLayer(const OriginsDescriptor& mergerDescriptor,
     const char* name)
 {