Extend LRN layer support with IE backend

modules/dnn/src/layers/lrn_layer.cpp

@@ -91,7 +91,7 @@ public:
     virtual bool supportBackend(int backendId) CV_OVERRIDE
     {
         if (backendId == DNN_BACKEND_INFERENCE_ENGINE)
-            return (bias == 1) && (preferableTarget != DNN_TARGET_MYRIAD || type == SPATIAL_NRM);
+            return bias == 1;
         return backendId == DNN_BACKEND_OPENCV || backendId == DNN_BACKEND_HALIDE;
     }
 

modules/dnn/test/test_halide_layers.cpp

@@ -228,6 +228,10 @@ TEST_P(LRN, Accuracy)
     Backend backendId = get<0>(get<5>(GetParam()));
     Target targetId = get<1>(get<5>(GetParam()));
 
+    if ((inSize.width == 5 || inSize.height == 5) && targetId == DNN_TARGET_MYRIAD &&
+        nrmType == "ACROSS_CHANNELS")
+        throw SkipTestException("This test case is disabled");
+
     LayerParams lp;
     lp.set("norm_region", nrmType);
     lp.set("local_size", localSize);