media: staging: media: imx: imx7-media-csi: Drop imx_media_add_video_device call

There's no need to call imx_media_add_video_device() anymore, as the
video devices list it manages is only used by the control inheritance
mechanism in the helpers, which this driver doesn't use.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/imx/imx7-media-csi.c

@@ -1267,9 +1267,6 @@ static int imx7_csi_video_register(struct imx7_csi *csi)
 		return ret;
 	}
 
-	/* Add vdev to the video devices list. */
-	imx_media_add_video_device(&csi->imxmd, &csi->vdev);
-
 	return 0;
 }