[media] drxk: create only one frontend for both DVB-C and DVB-T

Instead of creating two DVB frontend entries for the same device,
create just one entry, and fill the delivery_system according with
the supported standards.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/drxk_hard.h b/drivers/media/dvb/frontends/drxk_hard.h
index 60bcd61..7e3e4cf 100644
--- a/drivers/media/dvb/frontends/drxk_hard.h
+++ b/drivers/media/dvb/frontends/drxk_hard.h
@@ -195,8 +195,7 @@
 };
 
 struct drxk_state {
-	struct dvb_frontend c_frontend;
-	struct dvb_frontend t_frontend;
+	struct dvb_frontend frontend;
 	struct dtv_frontend_properties props;
 	struct device *dev;