* TI - IRQ/DMA Crossbar

This version is an implementation of the Crossbar IRQ/DMA IP

Required properties:
- compatible : Should be "ti,dra-crossbar"
- crossbar-name: Name of the controller to which crossbar output is routed
- reg:	Contains crossbar register address range
- reg-width: Represents the width of the individual registers
- crossbar-lines:  Default mappings.Should contain the crossbar-name
		   device name, int/dma request number, crossbar number,
		   register offset in the same order.

Examples:
		crossbar_mpu: mpuirq@4a002a48 {
			compatible = "crossbar";
			crossbar-name = "mpu-irq";
			reg = <0x4a002a48 0x0130>;
			reg-width = <16>;
			crossbar-lines = "mpu-irq", "rtc-ss-alarm", <0x9f 0xd9 0x12c>,
					 "mpu-irq", "mcasp3-arevt", <0x9e 0x96 0x12a>,
					 "mpu-irq", "mcasp3-axevt", <0x9d 0x97 0x128>;
		};

