ASoC: SOF: mtrace: rework mtrace timestamp setting

ASoC: SOF: mtrace: rework mtrace timestamp setting

The original timestamp is built base on windows epoch time which is not
fit for Linux system and difficult to be used for kernel debugging. This
patch adopts syslog timestamp so that we can simply use dmesg to check
the timestamp between fw and kernel.

Signed-off-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://msgid.link/r/20240322112703.4549-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>