net: dsa: lan9303: allow vid != 0 in port_fdb_{add|del} methods

LAN9303 doesn't associate FDB (ALR) entries with VLANs, it has just one
global Address Logic Resolution table [1].

Ignore VID in port_fdb_{add|del} methods, go on with the global table. This
is the same semantics as hellcreek or RZ/N1 implement.

Visible symptoms:
LAN9303_MDIO 5b050000.ethernet-1:00: port 2 failed to delete 00:xx:xx:xx:xx:cf vid 1 from fdb: -2
LAN9303_MDIO 5b050000.ethernet-1:00: port 2 failed to add 00:xx:xx:xx:xx:cf vid 1 to fdb: -95

[1] https://ww1.microchip.com/downloads/en/DeviceDoc/00002308A.pdf

Fixes: 0620427e ("net: dsa: lan9303: Add fdb/mdb manipulation")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20230531143826.477267-1-alexander.sverdlin@siemens.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/lan9303-core.c

@@ -1188,8 +1188,6 @@ static int lan9303_port_fdb_add(struct dsa_switch *ds, int port,
 	struct lan9303 *chip = ds->priv;
 
 	dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
-	if (vid)
-		return -EOPNOTSUPP;
 
 	return lan9303_alr_add_port(chip, addr, port, false);
 }
@@ -1201,8 +1199,6 @@ static int lan9303_port_fdb_del(struct dsa_switch *ds, int port,
 	struct lan9303 *chip = ds->priv;
 
 	dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
-	if (vid)
-		return -EOPNOTSUPP;
 	lan9303_alr_del_port(chip, addr, port);
 
 	return 0;