netem: define NETEM_DIST_MAX

Rather than magic constant in code, expose the maximum size of
packet distribution table in API. In iproute2, q_netem defines
MAX_DIST as 16K already.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 5afee2b..8913822 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -495,6 +495,7 @@
 };
 
 #define NETEM_DIST_SCALE	8192
+#define NETEM_DIST_MAX		16384
 
 /* DRR */