net: dsa: qca8k: unify bus id naming with legacy and OF mdio bus

Add support for multiple switch with OF mdio bus declaration.
Unify the bus id naming and use the same logic for both legacy and OF
mdio bus.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/qca8k.c

@@ -1323,6 +1323,8 @@ qca8k_mdio_register(struct qca8k_priv *priv)
 		return -ENOMEM;
 
 	bus->priv = (void *)priv;
+	snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d.%d",
+		 ds->dst->index, ds->index);
 	bus->parent = ds->dev;
 	bus->phy_mask = ~ds->phys_mii_mask;
 	ds->slave_mii_bus = bus;
@@ -1330,7 +1332,6 @@ qca8k_mdio_register(struct qca8k_priv *priv)
 	/* Check if the devicetree declare the port:phy mapping */
 	mdio = of_get_child_by_name(priv->dev->of_node, "mdio");
 	if (of_device_is_available(mdio)) {
-		snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d", ds->index);
 		bus->name = "qca8k slave mii";
 		bus->read = qca8k_internal_mdio_read;
 		bus->write = qca8k_internal_mdio_write;
@@ -1340,8 +1341,6 @@ qca8k_mdio_register(struct qca8k_priv *priv)
 	/* If a mapping can't be found the legacy mapping is used,
 	 * using the qca8k_port_to_phy function
 	 */
-	snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d.%d",
-		 ds->dst->index, ds->index);
 	bus->name = "qca8k-legacy slave mii";
 	bus->read = qca8k_legacy_mdio_read;
 	bus->write = qca8k_legacy_mdio_write;