media: usb: don't initialize vars if not needed

Some local variables will be set to an appropriate value before usage.
Thus omit explicit initialisations at the beginning of these functions.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/radio/radio-mr800.c

@@ -511,7 +511,7 @@ static int usb_amradio_probe(struct usb_interface *intf,
 				const struct usb_device_id *id)
 {
 	struct amradio_device *radio;
-	int retval = 0;
+	int retval;
 
 	radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL);
 

drivers/media/radio/radio-wl1273.c

@@ -671,7 +671,7 @@ fail:
 static int wl1273_fm_suspend(struct wl1273_device *radio)
 {
 	struct wl1273_core *core = radio->core;
-	int r = 0;
+	int r;
 
 	/* Cannot go from OFF to SUSPENDED */
 	if (core->mode == WL1273_MODE_RX)

drivers/media/radio/si470x/radio-si470x-usb.c

@@ -578,7 +578,7 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
 	struct si470x_device *radio;
 	struct usb_host_interface *iface_desc;
 	struct usb_endpoint_descriptor *endpoint;
-	int i, int_end_size, retval = 0;
+	int i, int_end_size, retval;
 	unsigned char version_warning = 0;
 
 	/* private data allocation and initialization */

drivers/media/usb/cx231xx/cx231xx-cards.c

@@ -1217,7 +1217,7 @@ static void cx231xx_config_tuner(struct cx231xx *dev)
 static int read_eeprom(struct cx231xx *dev, struct i2c_client *client,
 		       u8 *eedata, int len)
 {
-	int ret = 0;
+	int ret;
 	u8 start_offset = 0;
 	int len_todo = len;
 	u8 *eedata_cur = eedata;

drivers/media/usb/cx231xx/cx231xx-dvb.c

@@ -630,7 +630,7 @@ static void unregister_dvb(struct cx231xx_dvb *dvb)
 
 static int dvb_init(struct cx231xx *dev)
 {
-	int result = 0;
+	int result;
 	struct cx231xx_dvb *dvb;
 	struct i2c_adapter *tuner_i2c;
 	struct i2c_adapter *demod_i2c;

drivers/media/usb/go7007/snd-go7007.c

@@ -227,7 +227,7 @@ int go7007_snd_init(struct go7007 *go)
 {
 	static int dev;
 	struct go7007_snd *gosnd;
-	int ret = 0;
+	int ret;
 
 	if (dev >= SNDRV_CARDS)
 		return -ENODEV;

drivers/media/usb/tm6000/tm6000-cards.c

@@ -1174,7 +1174,7 @@ static int tm6000_usb_probe(struct usb_interface *interface,
 {
 	struct usb_device *usbdev;
 	struct tm6000_core *dev;
-	int i, rc = 0;
+	int i, rc;
 	int nr = 0;
 	char *speed;