netem: fix build error on 32bit arches

ERROR: "__udivdi3" [net/sched/sch_netem.ko] undefined!

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Hagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: David S. Miller <davem@davemloft.net>