[media] rtl2832: wrap DVBv5 BER to DVBv3

Change legacy DVBv3 read BER to return values calculated by DVBv5
statistics.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/rtl2832.c

@@ -805,20 +805,11 @@ static int rtl2832_read_snr(struct dvb_frontend *fe, u16 *snr)
 static int rtl2832_read_ber(struct dvb_frontend *fe, u32 *ber)
 {
 	struct rtl2832_dev *dev = fe->demodulator_priv;
-	struct i2c_client *client = dev->client;
-	int ret;
-	u8 buf[2];
-
-	ret = rtl2832_rd_regs(dev, 0x4e, 3, buf, 2);
-	if (ret)
-		goto err;
 
-	*ber = buf[0] << 8 | buf[1];
+	*ber = (dev->post_bit_error - dev->post_bit_error_prev);
+	dev->post_bit_error_prev = dev->post_bit_error;
 
 	return 0;
-err:
-	dev_dbg(&client->dev, "failed=%d\n", ret);
-	return ret;
 }
 
 static void rtl2832_stat_work(struct work_struct *work)

drivers/media/dvb-frontends/rtl2832_priv.h

@@ -36,6 +36,7 @@ struct rtl2832_dev {
 	struct dvb_frontend fe;
 	struct delayed_work stat_work;
 	fe_status_t fe_status;
+	u64 post_bit_error_prev; /* for old DVBv3 read_ber() calculation */
 	u64 post_bit_error;
 	u64 post_bit_count;
 	bool i2c_gate_state;