arm64: dts: meson: remove extra tab from ODROID N2/N2+ ext_mdio node

Remove an extra tab from the ext_mdio node in the ODROID N2/N2+ common
dtsi file.
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20210407042609.9736-2-christianshewitt@gmail.com

arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi

@@ -410,7 +410,7 @@ &cpu103 {
 
 &ext_mdio {
 	external_phy: ethernet-phy@0 {
-		/* Realtek RTL8211F (0x001cc916) */	
+		/* Realtek RTL8211F (0x001cc916) */
 		reg = <0>;
 		max-speed = <1000>;