[media] af9035: disable frontend0 I2C-gate control

Seems like tuners used for frontend0 are not behind demodulator
I2C-gate thus gate control is not needed. Disable it for sure as
it can cause problems some situations.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-usb/af9035.c

@@ -783,6 +783,9 @@ static int af9035_frontend_attach(struct dvb_usb_adapter *adap)
 		ret = -ENODEV;
 		goto err;
 	}
+
+	/* disable I2C-gate */
+	adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;
 	adap->fe_adap[0].fe->callback = af9035_frontend_callback;
 
 	return 0;