[media] dt-bindings: Add bindings for i.MX media driver

Freescale i.MX Media Video Device

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Video Media Controller node

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This is the media controller node for video capture support. It is a

virtual device that lists the camera serial interface nodes that the

media device will control.

Required properties:

- compatible : "fsl,imx-capture-subsystem";

- ports      : Should contain a list of phandles pointing to camera

		sensor interface ports of IPU devices

example:

capture-subsystem {

	compatible = "fsl,imx-capture-subsystem";

	ports = <&ipu1_csi0>, <&ipu1_csi1>;

};

mipi_csi2 node

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This is the device node for the MIPI CSI-2 Receiver core in the i.MX

SoC. This is a Synopsys Designware MIPI CSI-2 host controller core

combined with a D-PHY core mixed into the same register block. In

addition this device consists of an i.MX-specific "CSI2IPU gasket"

glue logic, also controlled from the same register block. The CSI2IPU

gasket demultiplexes the four virtual channel streams from the host

controller's 32-bit output image bus onto four 16-bit parallel busses

to the i.MX IPU CSIs.

Required properties:

- compatible	: "fsl,imx6-mipi-csi2";

- reg           : physical base address and length of the register set;

- clocks	: the MIPI CSI-2 receiver requires three clocks: hsi_tx

		  (the D-PHY clock), video_27m (D-PHY PLL reference

		  clock), and eim_podf;

- clock-names	: must contain "dphy", "ref", "pix";

- port@*        : five port nodes must exist, containing endpoints

		  connecting to the source and sink devices according to

		  of_graph bindings. The first port is an input port,

		  connecting with a MIPI CSI-2 source, and ports 1

		  through 4 are output ports connecting with parallel

		  bus sink endpoint nodes and correspond to the four

		  MIPI CSI-2 virtual channel outputs.

Optional properties:

- interrupts	: must contain two level-triggered interrupts,

		  in order: 100 and 101;