ASoC: SOF: ipc4-loader: save FW version info to debugfs

ASoC: SOF: ipc4-loader: save FW version info to debugfs

To check loaded FW version:

$ hexdump -C /sys/kernel/debug/sof/fw_version
00000000  02 00 07 00 63 00 01 00  00 00 00 00 00 00 00 00  |....c...........|

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240402145959.172619-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>