arm: dts: dra7: 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>
diff --git a/arch/arm/dts/dra72-evm.dts b/arch/arm/dts/dra72-evm.dts
index c572693..154b0a0 100644
--- a/arch/arm/dts/dra72-evm.dts
+++ b/arch/arm/dts/dra72-evm.dts
@@ -51,10 +51,16 @@
 };
 
 &cpsw_emac0 {
-	phy_id = <&davinci_mdio>, <3>;
+	phy-handle = <&ethphy0>;
 	phy-mode = "rgmii";
 };
 
+&davinci_mdio {
+	ethphy0: ethernet-phy@3 {
+		reg = <3>;
+	};
+};
+
 &mmc1 {
 	pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50", "sdr104";
 	pinctrl-0 = <&mmc1_pins_default>;