rockchip: puma: fix indentation for -u-boot.dtsi

Tabs not spaces, so transform it to the common styling.
Signed-off-by: NHeiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3399-puma-u-boot.dtsi

@@ -2,24 +2,24 @@
 
 #include "rk3399-u-boot.dtsi"
 / {
-       config {
-               u-boot,spl-payload-offset = <0x40000>; /* @ 256KB */
-               u-boot,mmc-env-offset = <0x4000>;      /* @  16KB */
-               u-boot,efi-partition-entries-offset = <0x200000>; /* 2MB */
-               u-boot,boot-led = "module_led";
-               sysreset-gpio = <&gpio1 RK_PA6 GPIO_ACTIVE_HIGH>;
-       };
+	config {
+		u-boot,spl-payload-offset = <0x40000>; /* @ 256KB */
+		u-boot,mmc-env-offset = <0x4000>;      /* @  16KB */
+		u-boot,efi-partition-entries-offset = <0x200000>; /* 2MB */
+		u-boot,boot-led = "module_led";
+		sysreset-gpio = <&gpio1 RK_PA6 GPIO_ACTIVE_HIGH>;
+	};
 
-       chosen {
-               stdout-path = "serial0:115200n8";
-               u-boot,spl-boot-order = \
+	chosen {
+		stdout-path = "serial0:115200n8";
+		u-boot,spl-boot-order = \
 			"same-as-spl", &norflash, &sdhci, &sdmmc;
-       };
+	};
 
-       aliases {
-               spi0 = &spi1;
-               spi1 = &spi5;
-       };
+	aliases {
+		spi0 = &spi1;
+		spi1 = &spi5;
+	};
 
 	/*
 	 * The Qseven BIOS_DISABLE signal on the RK3399-Q7 keeps the on-module