Core code already clears reserved fields of struct
v4l2_pix_format_mplane, check commit 
4e1e0eb0e074 ("media: v4l2-ioctl: Zero
v4l2_plane_pix_format reserved fields").
Cc: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
                }
        }
 
-       memset(pix->reserved, 0, sizeof(pix->reserved));
        for (i = 0; i < pix->num_planes; i++) {
                plane_fmt = &pix->plane_fmt[i];
                depth = fmt->vpdma_fmt[i]->depth;
                                               plane_fmt->bytesperline *
                                               depth) >> 3;
                }
-               memset(plane_fmt->reserved, 0, sizeof(plane_fmt->reserved));
        }
 
        return 0;