[media] rtl28xxu: properly initialize pdata

As complained by smatch:
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1159 rtl2832u_tuner_attach() info: 'pdata' is not actually initialized (unreached code).

Cc: Antti Palosaari <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

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

···
 	struct i2c_board_info info;
 	struct i2c_client *client;
 	struct v4l2_subdev *subdev = NULL;
+	struct platform_device *pdev;
+	struct rtl2832_sdr_platform_data pdata;
 
 	dev_dbg(&d->intf->dev, "\n");
 
 	memset(&info, 0, sizeof(struct i2c_board_info));
+	memset(&pdata, 0, sizeof(pdata));
 
 	switch (dev->tuner) {
 	case TUNER_RTL2832_FC0012:
···
 
 	/* register SDR */
 	switch (dev->tuner) {
-		struct platform_device *pdev;
-		struct rtl2832_sdr_platform_data pdata = {};
-
 	case TUNER_RTL2832_FC0012:
 	case TUNER_RTL2832_FC0013:
 	case TUNER_RTL2832_E4000: