net: dsa: Move FDB add/del implementation inside DSA

Currently DSA uses switchdev's implementation of FDB add/del ndos. This
patch moves the implementation inside DSA in order to support the legacy
way for static FDB configuration.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index fe90e64..5d4e668 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -111,6 +111,13 @@ bool dsa_schedule_work(struct work_struct *work);
 /* legacy.c */
 int dsa_legacy_register(void);
 void dsa_legacy_unregister(void);
+int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
+		       struct net_device *dev,
+		       const unsigned char *addr, u16 vid,
+		       u16 flags);
+int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
+		       struct net_device *dev,
+		       const unsigned char *addr, u16 vid);
 
 /* port.c */
 int dsa_port_set_state(struct dsa_port *dp, u8 state,