* Socionext Framebuffer

Socionext IRIS is a kind of display engine.

Required properties:
- compatible : Should be "socionext,f-iris-fb"
- reg : Address and length of the register memory map.
- interrupts : irq number for this device.
- id : Identification number.
- simple : Define to use simple framebuffer or fdb-drm.
	   <0> for fdb-drm, and nonzero for simple linux framebuffer.
	   (fdb: Socionext Display Bus)
- clocks : Refer Documentation/devicetree/bindings/clock/clock-bindings.txt
- clock-names : Refer Documentation/devicetree/bindings/clock/clock-bindings.txt

Optional properties:
- h-pixels-fb-offset : Horizontal offset for framebuffer start.
- mode : Resolution definition.

Example:
	fb0: iris-dsi@fb0 {
		compatible = "socionext,f-iris-fb";
		reg = <0 0x37020000 0x8000>;
		interrupts = <0 212 0x4>,
			     <0 227 0x4>;
		id = <0>;
		simple = <0>;
		mode = "768x1280x32bpp";
		h-pixels-fb-offset = <12>;
		clocks = <&clk_dphy_1_0>, <&clk_main_1_3>, <&clk_main_3_3>;
		clock-names = "clk1", "clk2", "clk3";
	};
