Mediatek DTV AMP RT9114 Controller

Required properties:
- compatible: "mediatek,amp","mediatek, rt9114"
- reg: i2c slave address
- ampmute-gpios: amp mute gpio
- ampreset-gpios: amp reset gpio
- ampreset-reg: amp reset register when gpio not register at dts
- reset-invertor: gpio reset invertor
- mute-invertor: gpio mute invertor

Example:

mtk-amp@1B {
	#address-cells = <1>;
	#size-cells = <1>;
	compatible = "mediatek,amp","mediatek, rt9114";
	reg = <0x1B>;
	status = "okay";
	ampreset-gpios = <&gpio_sar0 3 GPIO_ACTIVE_HIGH>;
	ampmute-gpios = <&gpio_pm_gpio0 7 GPIO_ACTIVE_HIGH>;
	ampreset-reg = <0x322b16>;
	reset-invertor = <1>;
	mute-invertor = <1>;
};