ASoC: SOF: add Kconfig option for probe workqueues

ASoC: SOF: add Kconfig option for probe workqueues

The probe workqueue is currently used in the HDaudio case, following
the example of the snd-hda-intel driver.

For development and validation, it's useful to enable the probe
workqueue even with ACPI devices or NOCODEC mode.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20210409220121.1542362-2-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>