PCI: use pci_is_pcie() in pci core

Change for PCI core to use pci_is_pcie() instead of checking
pci_dev->is_pcie.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/dmar.c

@@ -329,7 +329,7 @@ found:
 	for (bus = dev->bus; bus; bus = bus->parent) {
 		struct pci_dev *bridge = bus->self;
 
-		if (!bridge || !bridge->is_pcie ||
+		if (!bridge || !pci_is_pcie(bridge) ||
 		    bridge->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE)
 			return 0;