net: sched: remove ndo_setup_tc check from tc_can_offload

Since tc_can_offload is always called from block callback or egdev
callback, no need to check if ndo_setup_tc exists.

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