stmmac: pci: Use pci_dev_id() helper

Use new helper pci_dev_id() to simplify the code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c

@@ -204,7 +204,7 @@ static int quark_default_data(struct pci_dev *pdev,
 		ret = 1;
 	}
 
-	plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
+	plat->bus_id = pci_dev_id(pdev);
 	plat->phy_addr = ret;
 	plat->interface = PHY_INTERFACE_MODE_RMII;