ARM: dts: imx6sx-sabreauto: drop 'regulators' container node

Let's drop the 'regulators' container node by giving VCC_SD3 an unique
name and removing 'reg' property, so that the fixed regulator can be
under root node directly.
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6sx-sabreauto.dts

@@ -18,14 +18,8 @@
 		reg = <0x80000000 0x80000000>;
 	};
 
-	regulators {
-		compatible = "simple-bus";
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		vcc_sd3: regulator@0 {
+	vcc_sd3: regulator-vcc-sd3 {
 		compatible = "regulator-fixed";
-			reg = <0>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_vcc_sd3>;
 		regulator-name = "VCC_SD3";
@@ -34,7 +28,6 @@
 		gpio = <&gpio2 11 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
-	};
 };
 
 &anaclk2 {