staging: rtl8723bs: Fix trailing semicolon

The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/ioctl_linux.c

@@ -967,7 +967,7 @@ static int rtw_wx_set_mode(struct net_device *dev, struct iw_request_info *a,
 			break;
 
 		default :
-			ret = -EINVAL;;
+			ret = -EINVAL;
 			RT_TRACE(_module_rtl871x_ioctl_os_c, _drv_err_, ("\n Mode: %s is not supported \n", iw_operation_mode[wrqu->mode]));
 			goto exit;
 	}