stmmac: pci: Use pci_dev_id() helper

Use new helper pci_dev_id() to simplify the code.

Signed-off-by: Heiner Kallweit <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>

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

···
 		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;