rtlwifi: Use pci_pcie_cap()

Use function pci_pcie_cap() instead of accessing struct member directly.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index bf3b574..353e203 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -1608,7 +1608,7 @@
 		pcipriv->ndis_adapter.pcibridge_funcnum =
 		    PCI_FUNC(bridge_pdev->devfn);
 		pcipriv->ndis_adapter.pcibridge_pciehdr_offset =
-		    bridge_pdev->pcie_cap;
+		    pci_pcie_cap(bridge_pdev);
 		pcipriv->ndis_adapter.pcicfg_addrport =
 		    (pcipriv->ndis_adapter.pcibridge_busnum << 16) |
 		    (pcipriv->ndis_adapter.pcibridge_devnum << 11) |