sch_htb: fix doc warning in htb_deactivate_prios()

Add description for parameters of htb_deactivate_prios()
to fix gcc W=1 warnings:

net/sched/sch_htb.c:442: warning: Function parameter or member 'q' not described in 'htb_deactivate_prios'
net/sched/sch_htb.c:442: warning: Function parameter or member 'cl' not described in 'htb_deactivate_prios'
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/sch_htb.c

@@ -448,6 +448,8 @@ static void htb_activate_prios(struct htb_sched *q, struct htb_class *cl)
 
 /**
  * htb_deactivate_prios - remove class from feed chain
+ * @q: the priority event queue
+ * @cl: the class to deactivate
  *
  * cl->cmode must represent old mode (before deactivation). It does
  * nothing if cl->prio_activity == 0. Class is removed from all feed