use no_pci_devices() in pci/search.c

We have an API function for this now.

Cc: Zhang Yanmin <yanmin.zhang@intel.com>
Cc: Greg KH <greg@kroah.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/pci/search.c

@@ -202,7 +202,7 @@ static struct pci_dev * pci_find_subsys(unsigned int vendor,
 	 * can cause some machines to crash.  So here we detect and flag that
 	 * situation and bail out early.
 	 */
-	if (unlikely(list_empty(&pci_devices)))
+	if (unlikely(no_pci_devices()))
 		return NULL;
 	down_read(&pci_bus_sem);
 	n = from ? from->global_list.next : pci_devices.next;
@@ -277,7 +277,7 @@ pci_get_subsys(unsigned int vendor, unsigned int device,
 	 * can cause some machines to crash.  So here we detect and flag that
 	 * situation and bail out early.
 	 */
-	if (unlikely(list_empty(&pci_devices)))
+	if (unlikely(no_pci_devices()))
 		return NULL;
 	down_read(&pci_bus_sem);
 	n = from ? from->global_list.next : pci_devices.next;