net: dsa: loop: Set correct number of ports

We only support DSA_LOOP_NUM_PORTS in the switch, do not tell the DSA
core to allocate up to DSA_MAX_PORTS which is nearly the double (6 vs.
11).

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/dsa_loop.c

@@ -275,7 +275,7 @@ static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
 		return -ENOMEM;
 
 	ds->dev = &mdiodev->dev;
-	ds->num_ports = DSA_MAX_PORTS;
+	ds->num_ports = DSA_LOOP_NUM_PORTS;
 
 	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
 	if (!ps)