Ux500 MUSB

Required properties:
 - compatible : Should be "stericsson,db8500-musb"
 - reg        : Offset and length of registers
 - interrupts : Interrupt; mode, number and trigger
 - dr_mode    : Dual-role; either host mode "host", peripheral mode "peripheral"
                or both "otg"

Optional properties:
 - dmas       : A list of dma channels;
                dma-controller, event-line, fixed-channel, flags
 - dma-names  : An ordered list of channel names affiliated to the above

Example:

usb_per5@a03e0000 {
	compatible = "stericsson,db8500-musb";
	reg = <0xa03e0000 0x10000>;
	interrupts = <0 23 0x4>;
	interrupt-names = "mc";

	dr_mode = "otg";

	dmas = <&dma 38 0 0x2>, /* Logical - DevToMem */
	       <&dma 38 0 0x0>, /* Logical - MemToDev */
	       <&dma 37 0 0x2>, /* Logical - DevToMem */
	       <&dma 37 0 0x0>, /* Logical - MemToDev */
	       <&dma 36 0 0x2>, /* Logical - DevToMem */
	       <&dma 36 0 0x0>, /* Logical - MemToDev */
	       <&dma 19 0 0x2>, /* Logical - DevToMem */
	       <&dma 19 0 0x0>, /* Logical - MemToDev */
	       <&dma 18 0 0x2>, /* Logical - DevToMem */
	       <&dma 18 0 0x0>, /* Logical - MemToDev */
	       <&dma 17 0 0x2>, /* Logical - DevToMem */
	       <&dma 17 0 0x0>, /* Logical - MemToDev */
	       <&dma 16 0 0x2>, /* Logical - DevToMem */
	       <&dma 16 0 0x0>, /* Logical - MemToDev */
	       <&dma 39 0 0x2>, /* Logical - DevToMem */
	       <&dma 39 0 0x0>; /* Logical - MemToDev */

	dma-names = "iep_1_9",  "oep_1_9",
		    "iep_2_10", "oep_2_10",
		    "iep_3_11", "oep_3_11",
		    "iep_4_12", "oep_4_12",
		    "iep_5_13", "oep_5_13",
		    "iep_6_14", "oep_6_14",
		    "iep_7_15", "oep_7_15",
		    "iep_8",    "oep_8";
};
