Mediatek SSUSB xHCI SOC

The device node for Mediatek SOC USB3.0 host controller

Required properties:
 - compatible: Must contain one of the following:
	- "mediatek,mt3611-xhci"
	- "mediatek,mt3612-xhci"
 - 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 xHCI MAC
	"wakeup_deb_p0": for USB wakeup debounce clock of port0
	"wakeup_deb_p1": for USB wakeup debounce clock of port1



Example:
usb3h: usbh@11200000 {
			compatible = "mediatek,mt3611-xhci";
			reg = <0 0x11200000 0 0x3dff>,
			      <0 0x11203e00 0 0x0100>;
			interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_LOW>;
			clock-names = "sys_ck", "free_ck";
			status = "disabled";
};
