am335x: cpsw: make phy address configurable

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
diff --git a/drivers/net/cpsw.c b/drivers/net/cpsw.c
index af3d859..db04795 100644
--- a/drivers/net/cpsw.c
+++ b/drivers/net/cpsw.c
@@ -920,7 +920,10 @@
 			SUPPORTED_100baseT_Full |
 			SUPPORTED_1000baseT_Full);
 
-	phydev = phy_connect(priv->bus, 0, dev, slave->data->phy_if);
+	phydev = phy_connect(priv->bus,
+			CONFIG_PHY_ADDR,
+			dev,
+			slave->data->phy_if);
 
 	phydev->supported &= supported;
 	phydev->advertising = phydev->supported;