IVGCVSW-3722 Add function to specify min or max in ArgMinMaxDescriptor

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I2f9d9968cbfda3ec3eadbe9a746e93e816989a3d
diff --git a/include/armnn/Types.hpp b/include/armnn/Types.hpp
index 6d8ea6f..dbcb91a 100644
--- a/include/armnn/Types.hpp
+++ b/include/armnn/Types.hpp
@@ -54,6 +54,12 @@
     Square      = 9
 };
 
+enum class ArgMinMaxFunction
+{
+    Min = 0,
+    Max = 1
+};
+
 enum class PoolingAlgorithm
 {
     Max     = 0,