arm: dts: am335x: sync cpsw/mdio/phy with latest linux - drop phy_id

Synchronize CPSW/MDIO/PHY DT nodes with latest linux - replace deprecated
phy_id property with phy-handle.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Felix Brack <fb@ltec.ch>
Cc: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/arch/arm/dts/am335x-sl50.dts b/arch/arm/dts/am335x-sl50.dts
index 1bcc604..ebb56bd 100644
--- a/arch/arm/dts/am335x-sl50.dts
+++ b/arch/arm/dts/am335x-sl50.dts
@@ -507,13 +507,8 @@
 };
 
 &cpsw_emac0 {
-	phy_id = <&davinci_mdio>, <0>;
 	phy-mode = "mii";
-};
-
-&cpsw_emac1 {
-	phy_id = <&davinci_mdio>, <1>;
-	phy-mode = "mii";
+	phy-handle = <&ethphy0>;
 };
 
 &mac {
@@ -528,6 +523,12 @@
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&davinci_mdio_default>;
 	pinctrl-1 = <&davinci_mdio_sleep>;
+	reset-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
+	reset-delay-us = <100>;   /* PHY datasheet states 100us min */
+
+	ethphy0: ethernet-phy@0 {
+		reg = <0>;
+	};
 };
 
 &sham {