[PATCH] serial: samsung: add missing platform_driver_unregister() when module exit

[Wei Yongjun]

From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>

We have registered platform driver when module init, and
need unregister it when module exit.

Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
---
no compile test.
---
 drivers/tty/serial/samsung.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 074b919..8942941 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1803,6 +1803,7 @@ static int __init s3c24xx_serial_modinit(void)
 
 static void __exit s3c24xx_serial_modexit(void)
 {
+	platform_driver_unregister(&samsung_serial_driver);
 	uart_unregister_driver(&s3c24xx_uart_drv);
 }