[WAN]: Added missing netif_dormant_off() to generic HDLC

WAN: Fixed a problem with PPP/raw HDLC/X.25 protocols not doing
netif_dormant_off() at startup.

Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wan/hdlc_x25.c b/drivers/net/wan/hdlc_x25.c
index 07e5eef..a867fb4 100644
--- a/drivers/net/wan/hdlc_x25.c
+++ b/drivers/net/wan/hdlc_x25.c
@@ -212,6 +212,7 @@
 		dev->hard_header = NULL;
 		dev->type = ARPHRD_X25;
 		dev->addr_len = 0;
+		netif_dormant_off(dev);
 		return 0;
 	}