USB: serial: io_ti: bind to interface after fw download

commit e35d6d7c upstream.

Bind to the interface, but do not register any ports, after having
downloaded the firmware. The device will still disconnect and
re-enumerate, but this way we avoid an error messages from being logged
as part of the process:

io_ti: probe of 1-1.3:1.0 failed with error -5
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

drivers/usb/serial/io_ti.c

@@ -1390,8 +1390,7 @@ static int download_fw(struct edgeport_serial *serial)
 
 		dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
 
-		/* return an error on purpose */
-		return -ENODEV;
+		return 1;
 	}
 
 stayinbootmode: