* Samsung Exynos Adaptive Voltage Scaling

Required properties:
- compatible: should be "samsung,exynos5433-avs" for Exynos 5433.
- resource: the phandle for the resource which requires the AVS feature.
- vdd-supply: the phandle to the regulator that provides power to the resource.
- An empty property which is one of:
  - "samsung,avs-type-cpu-little"
  - "samsung,avs-type-cpu-big"
  is required to describe the resource type which requires the AVS feature.

Required properties for "samsung,exynos5433-avs"
- samsung,chipid-syscon: the phandle of the syscon node for the chipid
			register set.

Example 1) exynos-avs nodes in exynos5433.dtsi are as follows:

		/* Soc Common File */

		exynos_avs_cpu0: exynos-avs@0 {
			compatible = "samsung,exynos5433-avs";
			samsung,chipid-syscon = <&chipid>;
			resource = <&cpu0>;
			samsung,asv-type-cpu-little;
			status = "disabled";
		};

		exynos_avs_cpu4: exynos-avs@1 {
			compatible = "samsung,exynos5433-avs";
			samsung,chipid-syscon = <&chipid>;
			resource = <&cpu4>;
			samsung,avs-type-cpu-big;
			status = "disabled";
		 };

Example 2) The vdd-supply property of each exynos-avs node in exynos5433-tm2.dts
           is listed below.

	   	/*  Board Specific .dts File */

		&exynos_avs_cpu0 {
			vdd-supply = <&buck3_reg>;
			status = "okay";
		};

		&exynos_avs_cpu4 {
			vdd-supply = <&buck2_reg>;
			status = "okay";
		};
