COMPMID-801: NHWC support in CLIm2Col.

And extended tests coverage adding kernel shapes 3x1, 1x5 and 7x7

Change-Id: Ia7c1d4da2368d5f5fbc1a41187f4ac1aca5f150f
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/127727
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
diff --git a/tests/validation/fixtures/Im2ColFixture.h b/tests/validation/fixtures/Im2ColFixture.h
index 7ef3cdc..6e532e7 100644
--- a/tests/validation/fixtures/Im2ColFixture.h
+++ b/tests/validation/fixtures/Im2ColFixture.h
@@ -66,8 +66,7 @@
         input_info.set_data_layout(_data_layout);
 
         const TensorShape output_shape = compute_im2col_conv_shape(&input_info, _kernel_dims, _conv_info, _has_bias, Size2D(1U, 1U));
-
-        _target = compute_target(input_shape, output_shape, data_type);
+        _target                        = compute_target(input_shape, output_shape, data_type);
 
         compute_reference(input_shape, output_shape, data_type);
     }