[media] si2168: add FE_CAN_MULTISTREAM into caps

PLP selection was implemented for Si2168 last month (patchwork 25387). However, FE_CAN_MULTISTREAM was not added to dvb_frontend_ops of si2168. This patch adds FE_CAN_MULTISTREAM, which indicates that multiple PLP are supported.
Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Acked-by: Antti Palosaari <crope@iki.fi>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/si2168.c

@@ -622,7 +622,8 @@ static const struct dvb_frontend_ops si2168_ops = {
 			FE_CAN_GUARD_INTERVAL_AUTO |
 			FE_CAN_HIERARCHY_AUTO |
 			FE_CAN_MUTE_TS |
-			FE_CAN_2G_MODULATION
+			FE_CAN_2G_MODULATION |
+			FE_CAN_MULTISTREAM
 	},
 
 	.get_tune_settings = si2168_get_tune_settings,