net: dsa: mv88e6xxx: Fix typ0 when configuring 2.5Gbps

In order to enable 2.5Gbps mode, we need the base speed of 10G, plus
the Alt bit setting. Fix a typ0 that used 1Gb base speed.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/port.c

@@ -193,7 +193,7 @@ static int mv88e6xxx_port_set_speed(struct mv88e6xxx_chip *chip, int port,
 		ctrl = PORT_PCS_CTRL_SPEED_1000;
 		break;
 	case 2500:
-		ctrl = PORT_PCS_CTRL_SPEED_1000 | PORT_PCS_CTRL_ALTSPEED;
+		ctrl = PORT_PCS_CTRL_SPEED_10000 | PORT_PCS_CTRL_ALTSPEED;
 		break;
 	case 10000:
 		/* all bits set, fall through... */