ASoC: SOF: sof_ipc_pm_ops: Add support for DSP core power management

Add a new ops for handling DSP core power state which can be used to tell
the DSP to turn on/off a core (or to inform it that a core is going to be
turned on/off if the core is host managed).
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220610083549.16773-3-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-priv.h

@@ -378,10 +378,12 @@ struct sof_ipc_fw_tracing_ops {
  * struct sof_ipc_pm_ops - IPC-specific PM ops
  * @ctx_save:		Optional function pointer for context save
  * @ctx_restore:	Optional function pointer for context restore
+ * @set_core_state:	Optional function pointer for turning on/off a DSP core
  */
 struct sof_ipc_pm_ops {
 	int (*ctx_save)(struct snd_sof_dev *sdev);
 	int (*ctx_restore)(struct snd_sof_dev *sdev);
+	int (*set_core_state)(struct snd_sof_dev *sdev, int core_idx, bool on);
 };
 
 /**