[NET_SCHED]: kill jiffie conversion macros

Now that all packet schedulers have been converted to hrtimers most users
of PSCHED_JIFFIE2US and PSCHED_US2JIFFIE are gone. The remaining users use
it to convert external time units to packet scheduler clock ticks, so use
PSCHED_TICKS_PER_SEC instead.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 4d84200..f76c20c 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1469,7 +1469,7 @@
 		/* set class to be in HTB_CAN_SEND state */
 		cl->tokens = hopt->buffer;
 		cl->ctokens = hopt->cbuffer;
-		cl->mbuffer = PSCHED_JIFFIE2US(HZ * 60);	/* 1min */
+		cl->mbuffer = 60 * PSCHED_TICKS_PER_SEC;	/* 1min */
 		PSCHED_GET_TIME(cl->t_c);
 		cl->cmode = HTB_CAN_SEND;