mips: Loongson: Fix the link time qualifier of 'serial_exit()'

'exit' functions should be marked as __exit, not __init.

Fixes: 85cc028 ("mips: make loongsoon serial driver explicitly modular")
Signed-off-by: Christophe JAILLET <[email protected]>
Signed-off-by: Paul Burton <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

Author: tititiou36

arch/mips/loongson64/common/serial.c

@@ -110,7 +110,7 @@ static int __init serial_init(void)
 }
 module_init(serial_init);
 
-static void __init serial_exit(void)
+static void __exit serial_exit(void)
 {
 	platform_device_unregister(&uart8250_device);
 }