pkt_sched: Rename PSCHED_US2NS and PSCHED_NS2US

Let's use TICKS instead of US, so PSCHED_TICKS2NS and PSCHED_NS2TICKS
(like in PSCHED_TICKS_PER_SEC already) to avoid misleading.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index d728d81..23a1676 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -509,7 +509,7 @@
 			q->pmask |= (1<<TC_CBQ_MAXPRIO);
 
 			expires = ktime_set(0, 0);
-			expires = ktime_add_ns(expires, PSCHED_US2NS(sched));
+			expires = ktime_add_ns(expires, PSCHED_TICKS2NS(sched));
 			if (hrtimer_try_to_cancel(&q->delay_timer) &&
 			    ktime_to_ns(ktime_sub(
 					hrtimer_get_expires(&q->delay_timer),
@@ -620,7 +620,7 @@
 		ktime_t time;
 
 		time = ktime_set(0, 0);
-		time = ktime_add_ns(time, PSCHED_US2NS(now + delay));
+		time = ktime_add_ns(time, PSCHED_TICKS2NS(now + delay));
 		hrtimer_start(&q->delay_timer, time, HRTIMER_MODE_ABS);
 	}