[media] v4l2: add const to argument of write-only s_tuner ioctl

This ioctl is defined as IOW, so pass the argument as const.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
index b1d6b03..11316f2 100644
--- a/drivers/media/usb/au0828/au0828-video.c
+++ b/drivers/media/usb/au0828/au0828-video.c
@@ -1508,7 +1508,7 @@
 }
 
 static int vidioc_s_tuner(struct file *file, void *priv,
-				struct v4l2_tuner *t)
+				const struct v4l2_tuner *t)
 {
 	struct au0828_fh *fh = priv;
 	struct au0828_dev *dev = fh->dev;
@@ -1516,8 +1516,6 @@
 	if (t->index != 0)
 		return -EINVAL;
 
-	t->type = V4L2_TUNER_ANALOG_TV;
-
 	if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
 		dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, 1);