V4L/DVB (11072): au0828: advertise only NTSC-M (as opposed to all NTSC standards)

We don't now how to make any variant of NTSC work other than NTSC-M, so don't
advertise that we support the other variants.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/au0828/au0828-video.c

@@ -1591,8 +1591,8 @@ static const struct video_device au0828_video_template = {
 	.release                    = video_device_release,
 	.ioctl_ops 		    = &video_ioctl_ops,
 	.minor                      = -1,
-	.tvnorms                    = V4L2_STD_NTSC,
-	.current_norm               = V4L2_STD_NTSC,
+	.tvnorms                    = V4L2_STD_NTSC_M,
+	.current_norm               = V4L2_STD_NTSC_M,
 };
 
 /**************************************************************************/