ASoC: SOF: ipc4: Add support for control change

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

This series adds support for handling control (switch/enum) change notifications
sent by the firmware.
The use case is similar to what is already used by IPC3 version: the firmware
can update the value of an enum or switch and sends notification to the kernel,
which in turn will notify the user space of a change.