On-Chip OTP Memory for Freescale i.MX23/i.MX28

Required properties :
- compatible :
  - "fsl,imx23-ocotp" for i.MX23
  - "fsl,imx28-ocotp" for i.MX28
- #address-cells : Should be 1
- #size-cells : Should be 1
- reg : Address and length of OTP controller registers
- clocks : Should contain a reference to the hbus clock

= Data cells =
Are child nodes of mxs-ocotp, bindings of which as described in
bindings/nvmem/nvmem.txt

Example for i.MX28:

	ocotp: ocotp@8002c000 {
		compatible = "fsl,imx28-ocotp", "fsl,ocotp";
		#address-cells = <1>;
		#size-cells = <1>;
		reg = <0x8002c000 0x2000>;
		clocks = <&clks 25>;
	};