PCI hotplug: use pci_pcie_cap()

Use pci_pcie_cap() instead of pci_find_capability() to get PCIe capability
offset in PCI hotplug core. This avoids unnecessary search in PCI
configuration space.
Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/pcihp_slot.c

@@ -102,7 +102,7 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 		return;
 
 	/* Find PCI Express capability */
-	pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
+	pos = pci_pcie_cap(dev);
 	if (!pos)
 		return;