USB功能

&usb2phy {
	status = "okay";
};

&u2phy_otg0 {
	status = "okay";
};

&u2phy_otg1 {
	status = "okay";
};

&usb20_otg0 {
	status = "okay";
};

&usb20_otg1 {
	dr_mode = "host";
	status = "okay";
};