ARM: dts: renesas: Add compatible properties to RTL8201FL Ethernet PHYs

Add compatible values to Ethernet PHY subnodes representing Realtek
RTL8201FL PHYs on RZ/A2 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/a23ec[e-mail]

arch/arm/boot/dts/r7s9210-rza2mevb.dts

···
 	renesas,no-ether-link;
 	phy-handle = <&phy1>;
 	phy1: ethernet-phy@1 {
+		compatible = "ethernet-phy-id001c.c816",
+			     "ethernet-phy-ieee802.3-c22";
 		reg = <0>;
 	};
 };