net: replace ipfragok with skb->local_df

As Herbert Xu said: we should be able to simply replace ipfragok
with skb->local_df. commit f88037(sctp: Drop ipfargok in sctp_xmit function)
has droped ipfragok and set local_df value properly.

The patch kills the ipfragok parameter of .queue_xmit().

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index a56f98e..704298f 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -854,7 +854,7 @@
 			 IP_PMTUDISC_DO : IP_PMTUDISC_DONT;
 
 	SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
-	return ip_queue_xmit(skb, 0);
+	return ip_queue_xmit(skb);
 }
 
 static struct sctp_af sctp_af_inet;