ARM: dts: sunxi: correct indentation

Do not use spaces for indentation.
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20221002091959.68815-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm/boot/dts/sunxi-bananapi-m2-plus.dtsi

@@ -89,13 +89,13 @@ switch-4 {
 	};
 
 	reg_gmac_3v3: gmac-3v3 {
-		      compatible = "regulator-fixed";
-		      regulator-name = "gmac-3v3";
-		      regulator-min-microvolt = <3300000>;
-		      regulator-max-microvolt = <3300000>;
-		      startup-delay-us = <100000>;
-		      enable-active-high;
-		      gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>;
+		compatible = "regulator-fixed";
+		regulator-name = "gmac-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		startup-delay-us = <100000>;
+		enable-active-high;
+		gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>;
 	};
 
 	wifi_pwrseq: wifi_pwrseq {