qdev/prop: add pci devfn property

So we can parse "$slot.$fn" strings into devfn numbers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/qdev.h b/hw/qdev.h
index 2e196e1..dfd3e92 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -151,6 +151,7 @@
 extern PropertyInfo qdev_prop_hex64;
 extern PropertyInfo qdev_prop_ptr;
 extern PropertyInfo qdev_prop_macaddr;
+extern PropertyInfo qdev_prop_pci_devfn;
 
 /* Set properties between creation and init.  */
 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);