ARM: dts: renesas: Add compatible properties to uPD6061x Ethernet PHYs

Add compatible values to Ethernet PHY subnodes representing Renesas
uPD60610 or uPD60611 PHYs on RZ/A1 boards.  This allows software to
identify the PHY model at any time, regardless of the state of the PHY
reset line.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/335a1dfea905369da683e122e41e08ca1c5f90f7.1631174218.git.geert+renesas@glider.be

arch/arm/boot/dts/r7s72100-genmai.dts

@@ -108,6 +108,8 @@ &ether {
 	renesas,no-ether-link;
 	phy-handle = <&phy0>;
 	phy0: ethernet-phy@0 {
+		compatible = "ethernet-phy-idb824.2814",
+			     "ethernet-phy-ieee802.3-c22";
 		reg = <0>;
 	};
 };

arch/arm/boot/dts/r7s72100-rskrza1.dts

@@ -192,6 +192,8 @@ &ether {
 	renesas,no-ether-link;
 	phy-handle = <&phy0>;
 	phy0: ethernet-phy@0 {
+		compatible = "ethernet-phy-idb824.2814",
+			     "ethernet-phy-ieee802.3-c22";
 		reg = <0>;
 	};
 };