net: phy: atheros: Fix problem with phy_reset() clearing BMCR

In commit <a058052c358c> [net: phy: do not read configuration register on
reset], phy_reset() will clear the BMCR register. Bit 12(AUTO_NEGOTIATION)
is cleared too. It causes auto-negotiation timeout error on Atheros's
PHY AR8033.

To fix this problem, genphy_config_aneg() and genphy_restart_aneg()
needs to be called in ar8035_config() to enable and restart
auto-negotiation.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Acked-by: Stefan Agner <stefan@agner.ch>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/phy/atheros.c

@@ -33,6 +33,9 @@ static int ar8035_config(struct phy_device *phydev)
 
 	phydev->supported = phydev->drv->features;
 
+	genphy_config_aneg(phydev);
+	genphy_restart_aneg(phydev);
+
 	return 0;
 }