PCI: pcie portdrv: remove unused variable

Remove unused port_data variable left over from the MCH hotplug quirk
cleanup.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index af9bca3..52f84fc 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -187,7 +187,6 @@
  */
 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;