net: phylink: only restart AN if the link mode is using in-band AN

If we are not using in-band autonegotiation, there is no point passing
the request to restart autonegotiation on to the driver.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/phylink.c

@@ -429,7 +429,8 @@ static void phylink_mac_config_up(struct phylink *pl,
 static void phylink_mac_pcs_an_restart(struct phylink *pl)
 {
 	if (pl->link_config.an_enabled &&
-	    phy_interface_mode_is_8023z(pl->link_config.interface)) {
+	    phy_interface_mode_is_8023z(pl->link_config.interface) &&
+	    phylink_autoneg_inband(pl->cur_link_an_mode)) {
 		if (pl->pcs_ops)
 			pl->pcs_ops->pcs_an_restart(pl->config);
 		else