CS42L51 audio CODEC

Optional properties:

  - clocks : a list of phandles + clock-specifiers, one for each entry in
    clock-names

  - clock-names : must contain "MCLK"

Example:

cs42l51: cs42l51@4a {
	compatible = "cirrus,cs42l51";
	reg = <0x4a>;
	clocks = <&mclk_prov>;
	clock-names = "MCLK";
};