[media] em28xx: fix tuner/frequency handling

v4l2-compliance found problems with frequency clamping that wasn't
reported correctly and missing tuner index checks.
Also removed unnecessary tuner type checks (these are now done by the
v4l2 core).

Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Devin Heitmueller <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/usb/em28xx/em28xx-video.c

···
 		return -EINVAL;
 
 	strcpy(t->name, "Tuner");
-	t->type = V4L2_TUNER_ANALOG_TV;
 
 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
 	return 0;
···
 	struct em28xx_fh      *fh  = priv;
 	struct em28xx         *dev = fh->dev;
 
-	f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
+	if (0 != f->tuner)
+		return -EINVAL;
+
 	f->frequency = dev->ctl_freq;
 	return 0;
 }
···
 	if (0 != f->tuner)
 		return -EINVAL;
 
-	if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
-		return -EINVAL;
-	if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
-		return -EINVAL;
-
-	dev->ctl_freq = f->frequency;
 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
+	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, f);
+	dev->ctl_freq = f->frequency;
 
 	return 0;
 }