net: dsa: qca8k: 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/qca8k.c

@@ -955,8 +955,7 @@ qca8k_set_pm(struct qca8k_priv *priv, int enable)
 
 static int qca8k_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct qca8k_priv *priv = platform_get_drvdata(pdev);
+	struct qca8k_priv *priv = dev_get_drvdata(dev);
 
 	qca8k_set_pm(priv, 0);
 
@@ -965,8 +964,7 @@ static int qca8k_suspend(struct device *dev)
 
 static int qca8k_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct qca8k_priv *priv = platform_get_drvdata(pdev);
+	struct qca8k_priv *priv = dev_get_drvdata(dev);
 
 	qca8k_set_pm(priv, 1);