ARM: dts: imx28-m28evk: populate fixed regulators

Fixed regulators put under "regulators" node will not be populated,
unless simple-bus or something similar is used.  Drop the "regulators"
wrapper node to fix this.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/nxp/mxs/imx28-m28evk.dts

@@ -18,33 +18,28 @@ backlight {
 		default-brightness-level = <6>;
 	};
 
-	regulators {
-		reg_vddio_sd0: regulator@1 {
-			compatible = "regulator-fixed";
-			reg = <1>;
-			regulator-name = "vddio-sd0";
-			regulator-min-microvolt = <3300000>;
-			regulator-max-microvolt = <3300000>;
-			gpio = <&gpio3 28 0>;
-		};
+	reg_vddio_sd0: regulator-1 {
+		compatible = "regulator-fixed";
+		regulator-name = "vddio-sd0";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio3 28 0>;
+	};
 
-		reg_usb0_vbus: regulator@2 {
-			compatible = "regulator-fixed";
-			reg = <2>;
-			regulator-name = "usb0_vbus";
-			regulator-min-microvolt = <5000000>;
-			regulator-max-microvolt = <5000000>;
-			gpio = <&gpio3 12 0>;
-		};
+	reg_usb0_vbus: regulator-2 {
+		compatible = "regulator-fixed";
+		regulator-name = "usb0_vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio3 12 0>;
+	};
 
-		reg_usb1_vbus: regulator@3 {
-			compatible = "regulator-fixed";
-			reg = <3>;
-			regulator-name = "usb1_vbus";
-			regulator-min-microvolt = <5000000>;
-			regulator-max-microvolt = <5000000>;
-			gpio = <&gpio3 13 0>;
-		};
+	reg_usb1_vbus: regulator-3 {
+		compatible = "regulator-fixed";
+		regulator-name = "usb1_vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio3 13 0>;
 	};
 
 	sound {