Unisoc power-debug bindings

This node is used to define control information and address space node used the
power debug driver, which output the power and interrupt state will help us to
analyze the SoC system power exception.

Required properties:
- compatible: Should be "sprd,power-debug-sharkle","sprd,power-debug-sharkl3",
		"sprd,power-debug-sharkl5","sprd,power-debug-sharkl5pro",
		"sprd,power-debug-pike2","sprd,power-debug-roc1",
		"sprd,power-debug-orca"
- sprd,sys-pmu-apb: Specify the pmu-apb address space node in the soc system

optional properties:
- sprd,enable: 1-enable the state log output; 2-disable the log output
- sprd,scan-interval: Specify the log output period of the default log thread
- sprd,sys-ap-ahb: Specify the ap-ahb address space node in the soc system
- sprd,sys-ap-apb: Specify the ap-apb address space node in the soc system
- sprd,sys-aon-sec: Specify the aon-sec address space node in the soc system
- sprd,sys-aon-apb: Specify the aon-apb address space node in the soc system
- sprd,sys-ap-intc: Specify a list in which every element expresses a INTC0
		controller's address space.

Example:
	power: power-debug {
		compatible = "sprd,power-debug-sharkle";

		sprd,enable = <1>;
		sprd,scan-interval = <30>;

		sprd,sys-ap-ahb = <&ap_ahb_regs>;
		sprd,sys-ap-apb = <&ap_apb_regs>;
		sprd,sys-pmu-apb = <&pmu_apb_regs>;
		sprd,sys-aon-apb = <&aon_apb_regs>;
		sprd,sys-ap-intc = <&intc0_regs &intc1_regs
				&intc2_regs &intc3_regs>;
	};
