[media] rtl28xxu: use demod mux I2C adapter for every tuner

Tuners are connected to demod I2C adapter. Use that muxed adapter
for each tuner. That allows us to get rid of hackish FE gate control
solution.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/usb/dvb-usb-v2/rtl28xxu.c

@@ -1074,7 +1074,7 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
 	switch (priv->tuner) {
 	case TUNER_RTL2832_FC0012:
 		fe = dvb_attach(fc0012_attach, adap->fe[0],
-			&d->i2c_adap, &rtl2832u_fc0012_config);
+			priv->demod_i2c_adapter, &rtl2832u_fc0012_config);
 
 		/* since fc0012 includs reading the signal strength delegate
 		 * that to the tuner driver */
@@ -1087,7 +1087,7 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
 		break;
 	case TUNER_RTL2832_FC0013:
 		fe = dvb_attach(fc0013_attach, adap->fe[0],
-			&d->i2c_adap, 0xc6>>1, 0, FC_XTAL_28_8_MHZ);
+			priv->demod_i2c_adapter, 0xc6>>1, 0, FC_XTAL_28_8_MHZ);
 
 		/* fc0013 also supports signal strength reading */
 		adap->fe[0]->ops.read_signal_strength =
@@ -1132,7 +1132,8 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
 		}
 		break;
 	case TUNER_RTL2832_FC2580:
-		fe = dvb_attach(fc2580_attach, adap->fe[0], &d->i2c_adap,
+		fe = dvb_attach(fc2580_attach, adap->fe[0],
+				priv->demod_i2c_adapter,
 				&rtl2832u_fc2580_config);
 		break;
 	case TUNER_RTL2832_TUA9001:
@@ -1145,11 +1146,13 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
 		if (ret)
 			goto err;
 
-		fe = dvb_attach(tua9001_attach, adap->fe[0], &d->i2c_adap,
+		fe = dvb_attach(tua9001_attach, adap->fe[0],
+				priv->demod_i2c_adapter,
 				&rtl2832u_tua9001_config);
 		break;
 	case TUNER_RTL2832_R820T:
-		fe = dvb_attach(r820t_attach, adap->fe[0], &d->i2c_adap,
+		fe = dvb_attach(r820t_attach, adap->fe[0],
+				priv->demod_i2c_adapter,
 				&rtl2832u_r820t_config);
 
 		/* Use tuner to get the signal strength */