of/platform: remove all of_bus_type and of_platform_bus_type references

Both of_bus_type and of_platform_bus_type are just #define aliases
for the platform bus.  This patch removes all references to them and
switches to the of_register_platform_driver()/of_unregister_platform_driver()
API for registering.

Subsequent patches will convert each user of of_register_platform_driver()
into plain platform_drivers without the of_platform_driver shim.  At which
point the of_register_platform_driver()/of_unregister_platform_driver()
functions can be removed.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c
index 36e2448..a779e22 100644
--- a/drivers/serial/sunhv.c
+++ b/drivers/serial/sunhv.c
@@ -644,12 +644,12 @@
 	if (tlb_type != hypervisor)
 		return -ENODEV;
 
-	return of_register_driver(&hv_driver, &of_bus_type);
+	return of_register_platform_driver(&hv_driver);
 }
 
 static void __exit sunhv_exit(void)
 {
-	of_unregister_driver(&hv_driver);
+	of_unregister_platform_driver(&hv_driver);
 }
 
 module_init(sunhv_init);
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index 0a7dd68..9845fb1 100644
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -1130,12 +1130,12 @@
 		}
 	}
 
-	return of_register_driver(&sab_driver, &of_bus_type);
+	return of_register_platform_driver(&sab_driver);
 }
 
 static void __exit sunsab_exit(void)
 {
-	of_unregister_driver(&sab_driver);
+	of_unregister_platform_driver(&sab_driver);
 	if (sunsab_reg.nr) {
 		sunserial_unregister_minors(&sunsab_reg, sunsab_reg.nr);
 	}
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index 5deafc8..3cdf748 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -1586,7 +1586,7 @@
 			return err;
 	}
 
-	err = of_register_driver(&su_driver, &of_bus_type);
+	err = of_register_platform_driver(&su_driver);
 	if (err && num_uart)
 		sunserial_unregister_minors(&sunsu_reg, num_uart);
 
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index fcbe20d..d1e6bcb 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -1576,7 +1576,7 @@
 			goto out_free_tables;
 	}
 
-	err = of_register_driver(&zs_driver, &of_bus_type);
+	err = of_register_platform_driver(&zs_driver);
 	if (err)
 		goto out_unregister_uart;
 
@@ -1604,7 +1604,7 @@
 	return err;
 
 out_unregister_driver:
-	of_unregister_driver(&zs_driver);
+	of_unregister_platform_driver(&zs_driver);
 
 out_unregister_uart:
 	if (num_sunzilog) {
@@ -1619,7 +1619,7 @@
 
 static void __exit sunzilog_exit(void)
 {
-	of_unregister_driver(&zs_driver);
+	of_unregister_platform_driver(&zs_driver);
 
 	if (zilog_irq != -1) {
 		struct uart_sunzilog_port *up = sunzilog_irq_chain;