PCI: mark is_pcie obsolete

The "is_pcie" field in struct pci_dev is no longer needed because
struct pci_dev has PCIe capability offset in "pcie_cap" field and
(pcie_cap != 0) means the device is PCIe capable. This patch marks
"is_pcie" fields obsolete.

Current users of "is_pcie" field are:

- drivers/ssb/scan.c
- drivers/net/wireless/ath/ath9k/pci.c
- drivers/net/wireless/ath/ath5k/attach.c
- drivers/net/wireless/ath/ath5k/reset.c
- drivers/acpi/hest.c
- drivers/pci/pcie/pme/pcie_pme.c

Will post patches for each to use pci_is_pcie() as a follow-up.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

include/linux/pci.h

@@ -302,7 +302,8 @@ struct pci_dev {
 	unsigned int	msix_enabled:1;
 	unsigned int	ari_enabled:1;	/* ARI forwarding */
 	unsigned int	is_managed:1;
-	unsigned int	is_pcie:1;
+	unsigned int	is_pcie:1;	/* Obsolete. Will be removed.
+					   Use pci_is_pcie() instead */
 	unsigned int    needs_freset:1; /* Dev requires fundamental reset */
 	unsigned int	state_saved:1;
 	unsigned int	is_physfn:1;