Add compatible string to dais so that it can support DT based module
autoloading.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
 subnode of "dais" representing board specific dai setup.
 "dais" node should have following properties followed by dai children.
 
+- compatible:
+       Usage: required
+       Value type: <stringlist>
+       Definition: must be "qcom,q6afe-dais"
+
 - #sound-dai-cells
        Usage: required
        Value type: <u32>
        reg = <APR_SVC_AFE>;
 
        dais {
+               compatible = "qcom,q6afe-dais";
                #sound-dai-cells = <1>;
                #address-cells = <1>;
                #size-cells = <0>;