PCIe: portdrv: call pci_disable_device during remove

The PCIe port driver calls pci_enable_device() during probe but
never calls pci_disable_device() during remove.

Cc: [e-mail]
Signed-off-by: Alex Chiang <[e-mail]>
Signed-off-by: Matthew Wilcox <[e-mail]>

drivers/pci/pcie/portdrv_pci.c

···
 static void pcie_portdrv_remove (struct pci_dev *dev)
 {
 	pcie_port_device_remove(dev);
+	pci_disable_device(dev);
 	kfree(pci_get_drvdata(dev));
 }