[media] saa7134-dvb: Fix kworld sbtvd I2C gate control

The correct place to put i2c_gate_ctrl is before calling tda18271_attach,
because the driver tda18271 will use it to enable or disable the i2c-bus
from the demodulator to the tuner.

And thus eliminate the error message: "Unknown device (255) detected
@ 1-00c0, device not supported" in the driver tda18271.

In the device kworld_sbtvd (hybrid analog and digital TV) the control
of the i2c-bus to tuner is done in the analog demodulator and not in
the digital demodulator.
Signed-off-by: NManoel Pinheiro <pinusdtv@hotmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7134/saa7134-dvb.c

@@ -1796,10 +1796,10 @@ static int dvb_init(struct saa7134_dev *dev)
 			dvb_attach(tda829x_attach, fe0->dvb.frontend,
 				   &dev->i2c_adap, 0x4b,
 				   &tda829x_no_probe);
+			fe0->dvb.frontend->ops.i2c_gate_ctrl = kworld_sbtvd_gate_ctrl;
 			dvb_attach(tda18271_attach, fe0->dvb.frontend,
 				   0x60, &dev->i2c_adap,
 				   &kworld_tda18271_config);
-			fe0->dvb.frontend->ops.i2c_gate_ctrl = kworld_sbtvd_gate_ctrl;
 		}
 
 		/* mb86a20s need to use the I2C gateway */