e1000e: Use dev_get_drvdata where possible

Instead of using to_pci_dev + pci_get_drvdata,
use dev_get_drvdata to make code simpler.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -6296,7 +6296,7 @@ static void e1000e_flush_lpic(struct pci_dev *pdev)
 
 static int e1000e_pm_freeze(struct device *dev)
 {
-	struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev));
+	struct net_device *netdev = dev_get_drvdata(dev);
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 
 	netif_device_detach(netdev);
@@ -6629,7 +6629,7 @@ static int __e1000_resume(struct pci_dev *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int e1000e_pm_thaw(struct device *dev)
 {
-	struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev));
+	struct net_device *netdev = dev_get_drvdata(dev);
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 
 	e1000e_set_interrupt_capability(adapter);
@@ -6678,8 +6678,7 @@ static int e1000e_pm_resume(struct device *dev)
 
 static int e1000e_pm_runtime_idle(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct net_device *netdev = dev_get_drvdata(dev);
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	u16 eee_lp;