* Rockchip USB camera GPIO control driver

Required properties:
- compatible: should be "usb-cam-gpio"
- hd-cam-pin: HD camera on gpio pin
- ir-cam-pin: IR camera on gpio pin

Example:
	usb_cam_gpio: usb-cam-gpio {
		compatible = "usb-cam-gpio";
		pinctrl-names = "default";
		pinctrl-0 = <&usb_cam_on_gpio>;
		hd-cam-pin = <&gpio3 GPIO_A1 GPIO_ACTIVE_LOW>;
		ir-cam-pin = <&gpio3 GPIO_A2 GPIO_ACTIVE_HIGH>;
		status = "okay";
	};