net: ethernet: 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: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index 2375a01..14f0694 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -1000,7 +1000,7 @@
 	spin_lock_init(&priv->bflock);
 	INIT_WORK(&priv->reset_task, gfar_reset_task);
 
-	dev_set_drvdata(&ofdev->dev, priv);
+	platform_set_drvdata(ofdev, priv);
 	regs = priv->gfargrp[0].regs;
 
 	gfar_detect_errata(priv);
@@ -1240,15 +1240,13 @@
 
 static int gfar_remove(struct platform_device *ofdev)
 {
-	struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
+	struct gfar_private *priv = platform_get_drvdata(ofdev);
 
 	if (priv->phy_node)
 		of_node_put(priv->phy_node);
 	if (priv->tbi_node)
 		of_node_put(priv->tbi_node);
 
-	dev_set_drvdata(&ofdev->dev, NULL);
-
 	unregister_netdev(priv->ndev);
 	unmap_group_regs(priv);
 	free_gfar_dev(priv);