ASoC: SOF: ipc4: Handle ALSA kcontrol change notification from firmware

The control change notification is sent as module notification with a
standardized event_id (higher 16 bit is 0xA15A).
Add generic code to handle the module notification and invoke the control
update callback if the notification is an ALSA kcontrol change message.

Signed-off-by: Peter Ujfalusi <[email protected]>
Reviewed-by: Ranjani Sridharan <[email protected]>
Reviewed-by: Pierre-Louis Bossart <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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