bridge: mcast: Remove redundant function arguments

Drop the first three arguments and instead extract them from the MDB
configuration structure.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/bridge/br_mdb.c

@@ -786,13 +786,14 @@ out:
 	return brmctx;
 }
 
-static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
+static int br_mdb_add_group(const struct br_mdb_config *cfg,
-			    struct br_mdb_entry *entry,
-			    const struct br_mdb_config *cfg,
 			    struct netlink_ext_ack *extack)
 {
 	struct net_bridge_mdb_entry *mp, *star_mp;
 	struct net_bridge_port_group __rcu **pp;
+	struct br_mdb_entry *entry = cfg->entry;
+	struct net_bridge_port *port = cfg->p;
+	struct net_bridge *br = cfg->br;
 	struct net_bridge_port_group *p;
 	struct net_bridge_mcast *brmctx;
 	struct br_ip group = cfg->group;
@@ -879,7 +880,7 @@ static int __br_mdb_add(const struct br_mdb_config *cfg,
 	int ret;
 
 	spin_lock_bh(&cfg->br->multicast_lock);
-	ret = br_mdb_add_group(cfg->br, cfg->p, cfg->entry, cfg, extack);
+	ret = br_mdb_add_group(cfg, extack);
 	spin_unlock_bh(&cfg->br->multicast_lock);
 
 	return ret;