COMPMID-1048 Add NHWC data format support to Winograd filter transform 4x4_3x3

Change-Id: Ifd125fcb5451dbac3c28b15a9471048a74fee0ad
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/128987
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/src/core/Helpers.cpp b/src/core/Helpers.cpp
index e336331..c0af3bb 100644
--- a/src/core/Helpers.cpp
+++ b/src/core/Helpers.cpp
@@ -59,6 +59,13 @@
         ++n;
     }
 
+    if(anchor.num_dimensions() > 2)
+    {
+        window.set(2, Window::Dimension(anchor[2], std::max<size_t>(1, shape[2]), steps[2]));
+
+        ++n;
+    }
+
     for(; n < anchor.num_dimensions(); ++n)
     {
         window.set(n, Window::Dimension(anchor[n], std::max<size_t>(1, shape[n])));