[media] m88ds3103: implement BER

Implement read_ber for BER estimate.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/dvb-frontends/m88ds3103_priv.h

@@ -35,6 +35,7 @@ struct m88ds3103_priv {
 	struct dvb_frontend fe;
 	fe_delivery_system_t delivery_system;
 	fe_status_t fe_status;
+	u32 ber;
 	bool warm; /* FW running */
 	struct i2c_adapter *i2c_adapter;
 };