apm821xx: Force Ethernet PHYID on MX60/MX60W

The MX60's uboot disables all the PHYs before starting linux.
This causes the PHY/switch detection code to malfunction
almost all of the time. To get around this, set a compatible
flag to force PHYID.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Chris Blake <chrisrblake93@gmail.com>

target/linux/apm821xx/dts/meraki-mx60.dts

@@ -107,7 +107,7 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 		phy0: ethernet-phy@0 {
-			device_type = "ethernet-phy";
+			compatible = "ethernet-phy-id004d.d034";
 			reg = <0>;
 			qca,ar8327-initvals = <
 				0x0010 0x40000000