Hynetek Husb311 Type-C Port controllers DT bindings

Required properties:
- compatible:       hynetek,husb311

- reg:              the i2c slave address of typec port controller device.
- interrupt-parent: the phandle to the interrupt controller which provides
                    the interrupt.
- interrupts:       interrupt specification for tcpci alert.
- vbus-supply:      vbus regulator

Required sub-node:
- connector: The "usb-c-connector" attached to the tcpci chip, the bindings
  of connector node are specified in
  Documentation/devicetree/bindings/connector/usb-connector.txt

Example:

#include "dt-bindings/usb/pd.h"

husb0: husb311@4e {
	compatible = "hynetek,husb311";
	reg = <0x4e>;
	interrupt-parent = <&gpio1>;
	interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
	vbus-supply = <&vcc5v0_typec>;
	status = "okay";

	usb_con: connector {
		data-role = "dual";
		power-role = "dual";
		try-power-role = "sink";
		source-pdos = <PDO_FIXED(5000, 2000, PDO_FIXED_USB_COMM)>;
		sink-pdos = <PDO_FIXED(5000, 2000, PDO_FIXED_USB_COMM)>;
		op-sink-microwatt = <10000000>;

	};
};