Add missing specification of efm32_uart_exit as module_exit.

This fixes the following compilation warning:

  drivers/tty/serial/efm32-uart.c:840:123: warning: ?efm32_uart_exit? defined but not used [-Wunused-function]

Signed-off-by: Vincent Stehl? <redacted>
Cc: Uwe Kleine-K?nig <redacted>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Jiri Slaby <redacted>
---

Hi,

This can be seen with e.g. arm allmodconfig.

Best regards,

V.

 drivers/tty/serial/efm32-uart.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index c167a71..b373f64 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c

@@ -842,6 +842,7 @@ static void __exit efm32_uart_exit(void)
 	platform_driver_unregister(&efm32_uart_driver);
 	uart_unregister_driver(&efm32_uart_reg);
 }
+module_exit(efm32_uart_exit);
 
 MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
 MODULE_DESCRIPTION("EFM32 UART/USART driver");

-- 
2.0.0.rc2