PCI: pcie portdrv: remove unused variable

Remove unused port_data variable left over from the MCH hotplug quirk
cleanup.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/pcie/portdrv_core.c

@@ -187,7 +187,6 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask)
  */
 static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
 {
-	struct pcie_port_data *port_data = pci_get_drvdata(dev);
 	int irq, interrupt_mode = PCIE_PORT_NO_IRQ;
 	int i;