media: rockchip/rga: constify video_device structure

The video_device structure is only copied into another structure, so
it can be const.

Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/rockchip/rga/rga.c

@@ -700,7 +700,7 @@ static const struct v4l2_ioctl_ops rga_ioctl_ops = {
 	.vidioc_s_selection = vidioc_s_selection,
 };
 
-static struct video_device rga_videodev = {
+static const struct video_device rga_videodev = {
 	.name = "rockchip-rga",
 	.fops = &rga_fops,
 	.ioctl_ops = &rga_ioctl_ops,