ASoC: SOF: Intel: hda: Only dump firmware registers for IPC3

The firmware register dump is IPC3 specific, it is not available for other
IPC versions.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20220923133616.26267-6-peter.ujfalusi@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>