IVGCVSW-6803 Add int32 support for CONCATENATION in CpuRef


Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: Id9decafcebb6dbcac3a03516281524f22419cbfb
diff --git a/src/backends/reference/RefLayerSupport.cpp b/src/backends/reference/RefLayerSupport.cpp
index f5798c8..b55adfa 100644
--- a/src/backends/reference/RefLayerSupport.cpp
+++ b/src/backends/reference/RefLayerSupport.cpp
@@ -879,14 +879,15 @@
     IgnoreUnused(descriptor);
 
     bool supported = true;
-    std::array<DataType,6> supportedTypes =
+    std::array<DataType,7> supportedTypes =
     {
         DataType::BFloat16,
         DataType::Float32,
         DataType::Float16,
         DataType::QAsymmS8,
         DataType::QAsymmU8,
-        DataType::QSymmS16
+        DataType::QSymmS16,
+        DataType::Signed32
     };
 
     supported &= CheckSupportRule(TypeAnyOf(output, supportedTypes), reasonIfUnsupported,