ASoC: SOF: Intel: cnl: Use pm_gate->hdr.cmd in cnl_compact_ipc_compress()

Instead of first checking the msg->header (which is the hdr.cmd), use
directly the cmd from the message itself.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220128133620.9411-2-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/cnl.c

@@ -161,11 +161,9 @@ static void cnl_ipc_dsp_done(struct snd_sof_dev *sdev)
 static bool cnl_compact_ipc_compress(struct snd_sof_ipc_msg *msg,
 				     u32 *dr, u32 *dd)
 {
-	struct sof_ipc_pm_gate *pm_gate;
-
-	if (msg->header == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_GATE)) {
-		pm_gate = msg->msg_data;
+	struct sof_ipc_pm_gate *pm_gate = msg->msg_data;
 
+	if (pm_gate->hdr.cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_GATE)) {
 		/* send the compact message via the primary register */
 		*dr = HDA_IPC_MSG_COMPACT | HDA_IPC_PM_GATE;