[NET_SCHED]: sch_sfq: make internal queues visible as classes

Add support for dumping statistics and make internal queues visible as
classes.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 3276135..dbb7ac3 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -150,6 +150,11 @@
 	unsigned	flows;		/* Maximal number of flows  */
 };
 
+struct tc_sfq_xstats
+{
+	__s32		allot;
+};
+
 /*
  *  NOTE: limit, divisor and flows are hardwired to code at the moment.
  *