devcietree: bindings: add some MFD Keymile FPGAs

KEYMILE bfticu Chassis Management FPGA

The bfticu is a multifunction device that manages the whole chassis.

Its main functionality is to collect IRQs from the whole chassis and signals

them to a single controller.

Required properties:

- compatible: "keymile,bfticu"

- interrupt-controller: the bfticu FPGA is an interrupt controller

- interrupts: the main IRQ line to signal the collected IRQs

- #interrupt-cells : is 2 and their usage is compliant to the 2 cells variant

  of Documentation/devicetree/bindings/interrupt-controller/interrupts.txt

- interrupt-parent: the parent IRQ ctrl the main IRQ is connected to

- reg: access on the parent local bus (chip select, offset in chip select, size)

Example:

	chassis-mgmt@3,0 {

		compatible = "keymile,bfticu";

		interrupt-controller;

		#interrupt-cells = <2>;

		reg = <3 0 0x100>;

		interrupt-parent = <&mpic>;

		interrupts = <6 1 0 0>;

	};

KEYMILE qrio Board Control CPLD

The qrio is a multifunction device that controls the KEYMILE boards based on

the kmp204x design.

It is consists of a reset controller, watchdog timer, LEDs, and 2 IRQ capable

GPIO blocks.

Required properties:

- compatible: "keymile,qriox"

- reg: access on the parent local bus (chip select, offset in chip select, size)

Example:

	board-control@1,0 {

		compatible = "keymile,qriox";

		reg = <1 0 0x80>;

	};