[media] tvp5150: identify it as a MEDIA_ENT_F_ATV_DECODER

The tvp5150 is an analog TV decoder. Identify as such at
the media graph, or otherwise devices using it would fail.

That avoids the following warning:
	[ 1546.669139] usb 2-3.3: Entity type for entity tvp5150 5-005c was not initialized!
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/tvp5150.c

@@ -1319,6 +1319,9 @@ static int tvp5150_probe(struct i2c_client *c,
 	core->pads[DEMOD_PAD_IF_INPUT].flags = MEDIA_PAD_FL_SINK;
 	core->pads[DEMOD_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
 	core->pads[DEMOD_PAD_VBI_OUT].flags = MEDIA_PAD_FL_SOURCE;
+
+	sd->entity.function = MEDIA_ENT_F_ATV_DECODER;
+
 	res = media_entity_pads_init(&sd->entity, DEMOD_NUM_PADS, core->pads);
 	if (res < 0)
 		return res;