qdev: add netdev property

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/net.h b/net.h
index 605092a..6a24f55 100644
--- a/net.h
+++ b/net.h
@@ -47,6 +47,7 @@
 };
 
 VLANState *qemu_find_vlan(int id, int allocate);
+VLANClientState *qemu_find_netdev(const char *id);
 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
                                       VLANClientState *peer,
                                       const char *model,