boards: nxp: imx93_evk: Fix unit and first address mismatch

This fixes the following warning:

> unit address and first address in 'reg' (0x2) don't match for
> /enet@42890000/mdio/phy@0

Signed-off-by: Reto Schneider <[email protected]>

Author: rettichschnidi

boards/nxp/imx93_evk/imx93_evk_mimx9352_a55.dts

@@ -102,7 +102,7 @@
 	pinctrl-0 = <&pinmux_mdio>;
 	pinctrl-names = "default";
 	status = "okay";
-	phy: phy@0 {
+	phy: phy@2 {
 		compatible = "realtek,rtl8211f";
 		reg = <2>;
 		status = "okay";