ARM: shmobile: kzm9g-reference dts: Use tabs for indentation

Checkpatch says:

ERROR: code indent should use tabs where possible
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0-kzm9g-reference.dts

@@ -66,7 +66,7 @@
 	};
 
 	vmmc_sdhi0: regulator@2 {
-	        compatible = "regulator-fixed";
+		compatible = "regulator-fixed";
 		regulator-name = "SDHI0 Vcc";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
@@ -75,7 +75,7 @@
 	};
 
 	vmmc_sdhi2: regulator@3 {
-	        compatible = "regulator-fixed";
+		compatible = "regulator-fixed";
 		regulator-name = "SDHI2 Vcc";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;