net: sched: move the can_offload check from binding phase to rule insertion phase

This restores the original behaviour before the block callbacks were
introduced. Allow the drivers to do binding of block always, no matter
if the NETIF_F_HW_TC feature is on or off. Move the check to the block
callback which is called for rule insertion.

Reported-by: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dsa/slave.c

@@ -799,6 +799,9 @@ static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 {
 	struct net_device *dev = cb_priv;
 
+	if (!tc_can_offload(dev))
+		return -EOPNOTSUPP;
+
 	switch (type) {
 	case TC_SETUP_CLSMATCHALL:
 		return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);