ARM: dts: aspeed: bletchley: Enable mdio0 bus

Enable mdio0 bus based on DVT schematic.

TODO: Add Marvell 88E6191 Switch
Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
Reviewed-by: Patrick Williams <patrick@stwcx.xyz>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220509151118.4899-4-potin.lai.pt@gmail.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-facebook-bletchley.dts

@@ -827,6 +827,11 @@ &pinctrl_adc12_default &pinctrl_adc13_default
 		&pinctrl_adc14_default &pinctrl_adc15_default>;
 };
 
+&mdio0 {
+	status = "okay";
+	/* TODO: Add Marvell 88E6191X */
+};
+
 &mdio3 {
 	status = "okay";
 	/* TODO: Add Marvell 88X3310 */