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

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