net: phy: as21xxx: handle corner case with link and autoneg complete

Add missing case in custom read_link, when autoneg is started, autoneg
complete bit is reset but link is still not up.

Fixes: 830877d ("net: phy: Add support for Aeonsemi AS21xxx PHYs")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

Author: Ansuel

drivers/net/phy/as21xxx.c

@@ -658,6 +658,13 @@ static int as21xxx_read_link(struct phy_device *phydev, int *bmcr)
 		return status;
 
 	phydev->link = !!(status & MDIO_STAT1_LSTATUS);
+	phydev->autoneg_complete = !!(status & MDIO_AN_STAT1_COMPLETE);
+
+	/* Consider the case that autoneg was started and "aneg complete"
+	 * bit has been reset, but "link up" bit not yet.
+	 */
+	if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
+		phydev->link = 0;
 
 	return 0;
 }