drivers: net: ethernet: cpsw: consider number of slaves in interation

Make cpsw_add_default_vlan() look at the actual number of slaves for its
iteration, so boards with less than 2 slaves don't ooops at boot.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/cpsw.c

@@ -731,7 +731,7 @@ static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
 
 	writel(vlan, &priv->host_port_regs->port_vlan);
 
-	for (i = 0; i < 2; i++)
+	for (i = 0; i < priv->data.slaves; i++)
 		slave_write(priv->slaves + i, vlan, reg);
 
 	cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS << port,