Show a notice if ALSA device no longer matches what is found in the system.

If you boot with the default kernel, it should show 2 devices (onboard audio and USB). USB will be on device 1-X.

But if you install the USB kernel, it will only show the USB. USB will be on device 0-X.

If you configured the audio with default, and boot to USB, there will be a mismatch. Should add some code to hopefully detect this, and update the HW device automatically.