net: dsa: bcm_sf2: simplify getting .driver_data

We should get 'driver_data' from 'struct device' directly. Going via
platform_device is an unneeded step back and forth.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/bcm_sf2.c

@@ -1190,16 +1190,14 @@ static void bcm_sf2_sw_shutdown(struct platform_device *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int bcm_sf2_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
+	struct bcm_sf2_priv *priv = dev_get_drvdata(dev);
 
 	return dsa_switch_suspend(priv->dev->ds);
 }
 
 static int bcm_sf2_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
+	struct bcm_sf2_priv *priv = dev_get_drvdata(dev);
 
 	return dsa_switch_resume(priv->dev->ds);
 }