ASoC: SOF: prefix some terse and cryptic dev_dbg() with __func__

ASoC: SOF: prefix some terse and cryptic dev_dbg() with __func__

These helped troubleshoot some DMA issue in SOF.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20210928102635.26227-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>