Marvell 88PM860x regulator

Required properties:
- compatible: "marvell,88pm860x"
- reg: I2C slave address
- regulators: A node that houses a sub-node for each regulator within the
  device. Each sub-node is identified using the regulator-compatible
  property, with valid values listed below.

Example:

	pmic: 88pm860x@34 {
		compatible = "marvell,88pm860x";
		reg = <0x34>;

		regulators {
			BUCK1 {
			        regulator-min-microvolt = <1000000>;
			        regulator-max-microvolt = <1500000>;
			        regulator-boot-on;
			        regulator-always-on;
			};
			BUCK3 {
			        regulator-min-microvolt = <1000000>;
			        regulator-max-microvolt = <3000000>;
			        regulator-boot-on;
			        regulator-always-on;
			};
		};
	};
