serial: use platform_{get,set}_drvdata()

Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev,
so we can directly pass a struct platform_device.

Also, unnecessary dev_set_drvdata() is removed, because the driver core
clears the driver data to NULL after device_release or on probe failure.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c
index ba60708..cf86e72 100644
--- a/drivers/tty/serial/sunhv.c
+++ b/drivers/tty/serial/sunhv.c
@@ -577,7 +577,7 @@
 	if (err)
 		goto out_remove_port;
 
-	dev_set_drvdata(&op->dev, port);
+	platform_set_drvdata(op, port);
 
 	return 0;
 
@@ -601,7 +601,7 @@
 
 static int hv_remove(struct platform_device *dev)
 {
-	struct uart_port *port = dev_get_drvdata(&dev->dev);
+	struct uart_port *port = platform_get_drvdata(dev);
 
 	free_irq(port->irq, port);
 
@@ -612,8 +612,6 @@
 	kfree(port);
 	sunhv_port = NULL;
 
-	dev_set_drvdata(&dev->dev, NULL);
-
 	return 0;
 }