Mediatek SSUSB mtu3 SOC

The device node for Mediatek USB3.0 device controller

Required properties:
 - compatible: Must contain one of the following:
	- "mediatek,mt3611-mtu3"
	- "mediatek,mt3612-mtu3"
 - reg : specifies physical base address and size of the registers,
	the first one for MAC, the second for IPPC
 - interrupts : interrupt used by the controller
 - clocks : a list of phandle + clock-specifier pairs, one for each
	entry in clock-names
 - clock-names : must contain
	"sys_ck": for clock of device MAC




Example:
usb3dg: usbdg@112A0000 {
			compatible = "mediatek,mt3611-mtu3";
			reg = <0 0x112A1000 0 0x2dff>,
			      <0 0x112A3e00 0 0x0100>;
			interrupts = <GIC_SPI 129 IRQ_TYPE_LEVEL_LOW>;
			clock-names = "sys_ck", "free_ck";
			status = "disabled";
};
