[media] cxusb: initialize si2168_config struct

When new parameters are added for si2168 driver, the parameters have to be explicitly defined for each device if the
si2168_config struct is not initialized to all zeros.
Signed-off-by: NOlli Salonen <olli.salonen@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

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

@@ -1435,6 +1435,7 @@ static int cxusb_tt_ct2_4400_attach(struct dvb_usb_adapter *adap)
 	msleep(100);
 
 	/* attach frontend */
+	memset(&si2168_config, 0, sizeof(si2168_config));
 	si2168_config.i2c_adapter = &adapter;
 	si2168_config.fe = &adap->fe_adap[0].fe;
 	si2168_config.ts_mode = SI2168_TS_PARALLEL;