[NET_SCHED]: kill PSCHED_SET_PASTPERFECT/PSCHED_IS_PASTPERFECT

Use direct assignment and comparison instead.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 5d571aa..1e88301 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -532,7 +532,7 @@
 	} else
 		q->limit = max_t(u32, sch->dev->tx_queue_len, 1);
 
-	PSCHED_SET_PASTPERFECT(q->oldest);
+	q->oldest = PSCHED_PASTPERFECT;
 	return 0;
 }