media: mxb: update the tvnorms when changing input

The tuner input uses different tvnorms compared to the
S-Video/Composite inputs. So update the tvnorms field
in struct video_device when switching inputs.

This fixes a V4L2 compliance issue.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/pci/saa7146/mxb.c

@@ -512,6 +512,9 @@ static int vidioc_s_input(struct file *file, void *fh, unsigned int input)
 	if (err)
 		return err;
 
+	mxb->video_dev.tvnorms = mxb_inputs[input].std;
+	mxb->vbi_dev.tvnorms = mxb_inputs[input].std;
+
 	/* switch video in saa7111a */
 	if (saa7111a_call(mxb, video, s_routing, i, SAA7111_FMT_CCIR, 0))
 		pr_err("VIDIOC_S_INPUT: could not address saa7111a\n");