COMPMID-1582 Add YOLOLayer to graph API

Change-Id: I8eb7cf220f038b0ac70cb3df1f399a3b66bbca1b
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/148245
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: bsgcomp <bsgcomp@arm.com>
diff --git a/src/graph/backends/NEON/NENodeValidator.cpp b/src/graph/backends/NEON/NENodeValidator.cpp
index 9f0547f..47575d9 100644
--- a/src/graph/backends/NEON/NENodeValidator.cpp
+++ b/src/graph/backends/NEON/NENodeValidator.cpp
@@ -61,6 +61,8 @@
             return detail::validate_permute_layer<NEPermute>(*polymorphic_downcast<PermuteLayerNode *>(node));
         case NodeType::ReorgLayer:
             return detail::validate_reorg_layer<NEReorgLayer>(*polymorphic_downcast<ReorgLayerNode *>(node));
+        case NodeType::YOLOLayer:
+            return ARM_COMPUTE_CREATE_ERROR(arm_compute::ErrorCode::RUNTIME_ERROR, "Unsupported operation : YOLOLayer");
         default:
             return Status{};
     }