Richtek RT8973 MUIC

Required properties:

 - compatible	: should be "richtek,rt8973"
 - reg			: i2c slave address of the device
 - interrupt-parent	: parent of interrupt
 - interrupts		: interrupt to indicate accessories attach or detach
 - rt8973,irq-gpio	: irq gpio



Example:
		&soc {

			i2c_0: i2c@f9967000 {
					rt8973@14 {
						compatible = "richtek,rt8973";
						reg = <0x14>;
						interrupt-parent = <&msmgpio>;
						rt8973,irq-gpio = <&msmgpio 73 0>;
				};
			};
		};