IVGCVSW-2254 Add Reference workload for Maximum

Change-Id: Id7302c6b1df995ebe6eb8eb94bab38bee1b31b0b
diff --git a/src/backends/reference/workloads/RefElementwiseWorkload.hpp b/src/backends/reference/workloads/RefElementwiseWorkload.hpp
index 156613a..2772b77 100644
--- a/src/backends/reference/workloads/RefElementwiseWorkload.hpp
+++ b/src/backends/reference/workloads/RefElementwiseWorkload.hpp
@@ -9,6 +9,7 @@
 #include <backendsCommon/StringMapping.hpp>
 #include <backendsCommon/Workload.hpp>
 #include <backendsCommon/WorkloadData.hpp>
+#include "Maximum.hpp"
 
 namespace armnn
 {
@@ -119,4 +120,17 @@
                           DivisionQueueDescriptor,
                           StringMapping::RefDivisionWorkload_Execute>;
 
+
+using RefMaximumFloat32Workload =
+    RefElementwiseWorkload<armnn::maximum<float>,
+                          DataType::Float32,
+                          MaximumQueueDescriptor,
+                          StringMapping::RefMaximumWorkload_Execute>;
+
+using RefMaximumUint8Workload =
+    RefElementwiseWorkload<armnn::maximum<float>,
+                           DataType::QuantisedAsymm8,
+                           MaximumQueueDescriptor,
+                           StringMapping::RefMaximumWorkload_Execute>;
+
 } // armnn