dt/serial: Eliminate users of of_platform_{,un}register_driver

Get rid of users of of_platform_driver in drivers/serial.  The
of_platform_{,un}register_driver functions are going away, so the
users need to be converted to using the platform_bus_type directly.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index 5b246b1..b5fa2a5 100644
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -1006,7 +1006,7 @@
 	return 0;
 }
 
-static int __devinit sab_probe(struct platform_device *op, const struct of_device_id *match)
+static int __devinit sab_probe(struct platform_device *op)
 {
 	static int inst;
 	struct uart_sunsab_port *up;
@@ -1092,7 +1092,7 @@
 };
 MODULE_DEVICE_TABLE(of, sab_match);
 
-static struct of_platform_driver sab_driver = {
+static struct platform_driver sab_driver = {
 	.driver = {
 		.name = "sab",
 		.owner = THIS_MODULE,
@@ -1130,12 +1130,12 @@
 		}
 	}
 
-	return of_register_platform_driver(&sab_driver);
+	return platform_driver_register(&sab_driver);
 }
 
 static void __exit sunsab_exit(void)
 {
-	of_unregister_platform_driver(&sab_driver);
+	platform_driver_unregister(&sab_driver);
 	if (sunsab_reg.nr) {
 		sunserial_unregister_minors(&sunsab_reg, sunsab_reg.nr);
 	}