Binding for CEVA AHCI SATA Controller

Required properties:
  - reg: Physical base address and size of the controller's register area.
  - compatible: Compatibility string. Must be 'ceva,ahci-1v84'.
  - clocks: Input clock specifier. Refer to common clock bindings.
  - interrupts: Interrupt specifier. Refer to interrupt binding.

Optional properties:
  - ceva,broken-gen2: limit to gen1 speed instead of gen2.

Examples:
	ahci@fd0c0000 {
		compatible = "ceva,ahci-1v84";
		reg = <0xfd0c0000 0x200>;
		interrupt-parent = <&gic>;
		interrupts = <0 133 4>;
		clocks = <&clkc SATA_CLK_ID>;
		ceva,broken-gen2;
	};