mediatek: no longer hard-code WAN PHY of Netgear WAX206

The RealTek 2.5G PHY providing the WAN port of the Netgear WAX206 has
previously been hard-coded in the device tree. Now that the PHY can be
probed correctly also via Clause-45 MDIO, use that instead.

Signed-off-by: Daniel Golle <[email protected]>

target/linux/mediatek/dts/mt7622-netgear-wax206.dts

@@ -185,7 +185,7 @@
 					nvmem-cells = <&macaddr_factory_7fffa>;
 					nvmem-cell-names = "mac-address";
 					phy-handle = <&rtl8221b_phy>;
-					phy-mode = "sgmii";
+					phy-mode = "2500base-x";
 					reg = <5>;
 				};
 
@@ -204,7 +204,7 @@
 		};
 
 		rtl8221b_phy: ethernet-phy@7 {
-			compatible = "ethernet-phy-id001c.c849";
+			compatible = "ethernet-phy-ieee802.3-c45";
 			reg = <7>;
 			reset-gpios = <&pio 101 GPIO_ACTIVE_LOW>;
 			interrupts = <52 IRQ_TYPE_LEVEL_HIGH>;