drivers: net: use flow block API

This patch updates flow_block_cb_setup_simple() to use the flow block API.
Several drivers are also adjusted to use it.

This patch introduces the per-driver list of flow blocks to account for
blocks that are already in use.

Remove tc_block_offload alias.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -3769,6 +3769,8 @@ static int stmmac_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 	return ret;
 }
 
+static LIST_HEAD(stmmac_block_cb_list);
+
 static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 			   void *type_data)
 {
@@ -3776,7 +3778,8 @@ static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 
 	switch (type) {
 	case TC_SETUP_BLOCK:
-		return flow_block_cb_setup_simple(type_data, NULL,
+		return flow_block_cb_setup_simple(type_data,
+						  &stmmac_block_cb_list,
 						  stmmac_setup_tc_block_cb,
 						  priv, priv, true);
 	case TC_SETUP_QDISC_CBS: