COMPMID-569 - Implemented reference implementation and validation tests (NEON and CL) for Median3x3

Change-Id: I7028f0bcc4a502261210f536ed604a7651ab6726
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/91332
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/src/core/CL/kernels/CLMedian3x3Kernel.cpp b/src/core/CL/kernels/CLMedian3x3Kernel.cpp
index 95334c7..3b9fb1f 100644
--- a/src/core/CL/kernels/CLMedian3x3Kernel.cpp
+++ b/src/core/CL/kernels/CLMedian3x3Kernel.cpp
@@ -53,7 +53,7 @@
     constexpr unsigned int num_elems_written_per_iteration   = 8;
     constexpr unsigned int num_rows_read_per_iteration       = 3;
 
-    Window win = calculate_max_window_horizontal(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size());
+    Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size());
 
     AccessWindowRectangle  input_access(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration);
     AccessWindowHorizontal output_access(output->info(), 0, num_elems_written_per_iteration);