ARM: dts: vf-colibri: add carrier boards 3.3V supply

Add the carrier boards 3.3V supply as fixed regulator. This allows
to specify the power supply for nodes like backlight.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/vf-colibri-eval-v3.dtsi

@@ -50,6 +50,13 @@
 		clock-frequency = <16000000>;
 	};
 
+	reg_3v3: regulator-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
 	reg_5v0: regulator-5v0 {
 		compatible = "regulator-fixed";
 		regulator-name = "5V";
@@ -72,6 +79,7 @@
 &bl {
 	brightness-levels = <0 4 8 16 32 64 128 255>;
 	default-brightness-level = <6>;
+	power-supply = <&reg_3v3>;
 	status  = "okay";
 };
 
@@ -122,6 +130,10 @@
 	status = "okay";
 };
 
+&reg_module_3v3 {
+	vin-supply = <&reg_3v3>;
+};
+
 &uart0 {
 	status = "okay";
 };