arm64: zynqmp: Describe ethernet phy on kd240

Describe ADIN phy present on KD240 via ethernet-phy-id compatible string.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/61f89dc055f191fd4138b80bb7e3217d814502f5.1702904236.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
index 8d0ddec..298e802 100644
--- a/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
+++ b/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
@@ -120,6 +120,8 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 		phy0: ethernet-phy@8 { /* Adin u31 */
+			#phy-cells = <1>;
+			compatible = "ethernet-phy-id0283.bc30";
 			reg = <8>;
 			adi,rx-internal-delay-ps = <2000>;
 			adi,tx-internal-delay-ps = <2000>;