USB: gadget/multi: cdc_do_config: remove redundant check

cdc_do_config() had a double ret check after fsg_add().
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/multi.c

@@ -211,8 +211,6 @@ static int __init cdc_do_config(struct usb_configuration *c)
 	ret = fsg_add(c->cdev, c, fsg_common);
 	if (ret < 0)
 		return ret;
-	if (ret < 0)
-		return ret;
 
 	return 0;
 }