* Spreadtrum trusty information

Required properties:
- compatible: must be one of:
  * "sprd,customipi"
  * "sprd,trusty-smc-v1"
  * "sprd,trusty-irq-v1"
  * "sprd,trusty-virtio-v1"
  * "sprd,trusty-log-v1"


- reg: offset and length of the register set for the device
- interrupts: exactly one interrupt specifier

Example:
	trusty {
		compatible = "sprd,trusty-smc-v1";

		irq {
			compatible = "sprd,trusty-irq-v1";
			interrupt-templates = <&ipi 0>,
					      <&gic 1 GIC_PPI 0>,
					      <&gic 1 GIC_SPI 0>;
		};

		virtio {
			compatible = "sprd,trusty-virtio-v1";
		};

		log {

			compatible = "sprd,trusty-log-v1";
		};
	};
