regulator: sky81452: Modify Device Tree structure

SKY81452 voltage regulator

Required properties:

- regulator node named lout.

- any required generic properties defined in regulator.txt

Optional properties:

Example:

	regulator {

		/* generic regulator properties */

		regulator-name = "touch_en";

		lout {

			regulator-name = "sky81452-lout";

			regulator-min-microvolt = <4500000>;

			regulator-max-microvolt = <8000000>;

		};

	};