pch_gbe: don't use flush_scheduled_work()

Directly cancel adapter->reset_task instead of using to-be-deprecated
flush_scheduled_work().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: htejun

drivers/net/pch_gbe/pch_gbe_main.c

@@ -2247,7 +2247,7 @@ static void pch_gbe_remove(struct pci_dev *pdev)
 	struct net_device *netdev = pci_get_drvdata(pdev);
 	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 
-	flush_scheduled_work();
+	cancel_work_sync(&adapter->reset_task);
 	unregister_netdev(netdev);
 
 	pch_gbe_hal_phy_hw_reset(&adapter->hw);