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

Change-Id: I8964f5e8978c2d2a07734a381e3f7c656c22456a
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ce04bba..611e739 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -201,6 +201,8 @@
     src/armnn/layers/L2NormalizationLayer.cpp
     src/armnn/layers/LstmLayer.cpp
     src/armnn/layers/LstmLayer.hpp
+    src/armnn/layers/MaximumLayer.cpp
+    src/armnn/layers/MaximumLayer.hpp
     src/armnn/layers/MeanLayer.hpp
     src/armnn/layers/MeanLayer.cpp
     src/armnn/layers/MemCopyLayer.hpp