net: mvneta: fix comment about phylink_speed_down

mvneta has switched to phylink, so the comment should look
like "We may have called phylink_speed_down before".
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/mvneta.c

@@ -3637,7 +3637,7 @@ static void mvneta_start_dev(struct mvneta_port *pp)
 
 	phylink_start(pp->phylink);
 
-	/* We may have called phy_speed_down before */
+	/* We may have called phylink_speed_down before */
 	phylink_speed_up(pp->phylink);
 
 	netif_tx_start_all_queues(pp->dev);