Generic HDLC - remove now unneeded hdlc_device_desc

Removes now unneeded struct hdlc_device_desc

Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c
index 519e155..10396d9 100644
--- a/drivers/net/wan/hdlc_ppp.c
+++ b/drivers/net/wan/hdlc_ppp.c
@@ -122,7 +122,7 @@
 		if (result)
 			return result;
 
-		result = attach_hdlc_protocol(dev, &proto, NULL,
+		result = attach_hdlc_protocol(dev, &proto,
 					      sizeof(struct ppp_state));
 		if (result)
 			return result;