CM3588-NAS HDMI Audio enablement

[CryBaby]

The armbian edge image for the FriendlyElec CM3588-NAS is currently on kernel 6.17 but has no HDMI audio despite it having been added in 6.15 (I think). This is simply because it has not been enabled in the device tree for this board. You can enable it with this user overlay:

/dts-v1/;
/plugin/;

/ {
        fragment@0 {
                target-path = "/hdmi0-sound";

                __overlay__ {
                        status = "okay";
                };
        };


        fragment@1 {
                target-path = "/hdmi1-sound";

                __overlay__ {
                        status = "okay";
                };
        };
};