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 <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Link: https://lore.kernel.org/r/335a1[e-mail]

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

···
 	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

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