ASoC: SOF: add flag to snd_sof_pcm_stream for D0i3 compatible stream

Add flag d0i3_compatible to struct snd_sof_pcm_stream to denote if the
stream can tolerate a transition to the D0i3 substate while opened (thus
seen as 'active' by pm_runtime).
Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191025224122.7718-8-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-priv.h

@@ -310,6 +310,7 @@ struct snd_sof_pcm_stream {
 	struct sof_ipc_stream_posn posn;
 	struct snd_pcm_substream *substream;
 	struct work_struct period_elapsed_work;
+	bool d0i3_compatible; /* DSP can be in D0I3 when this pcm is opened */
 };
 
 /* ALSA SOF PCM device */