net: sched: propagate classid down to offload drivers

Drivers need classid to decide they support this specific qdisc+class
or not. So propagate it down via the tc_cls_common_offload struct.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>