[ARM] 4481/1: Fix a bug when i.MX is compiled as a module

Fix the unregistration order in the i.MX serial driver
Signed-off-by: NSreekrishnan Venkateswaran <krishhna@gmail.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

drivers/serial/imx.c

@@ -1114,8 +1114,8 @@ static int __init imx_serial_init(void)
 
 static void __exit imx_serial_exit(void)
 {
-	uart_unregister_driver(&imx_reg);
 	platform_driver_unregister(&serial_imx_driver);
+	uart_unregister_driver(&imx_reg);
 }
 
 module_init(imx_serial_init);