atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/atl1c/atl1c_main.c

@@ -2537,6 +2537,7 @@ static int atl1c_suspend(struct device *dev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int atl1c_resume(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
@@ -2563,6 +2564,7 @@ static int atl1c_resume(struct device *dev)
 
 	return 0;
 }
+#endif
 
 static void atl1c_shutdown(struct pci_dev *pdev)
 {