tty: serial: sprd: Fix module autoload for OF platform driver

This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index 3866516..9dbae01 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -782,6 +782,7 @@
 	{.compatible = "sprd,sc9836-uart",},
 	{}
 };
+MODULE_DEVICE_TABLE(of, serial_ids);
 
 static struct platform_driver sprd_platform_driver = {
 	.probe		= sprd_probe,