ASoC: SOF: Use auto-cleanup for firmware loading

ASoC: SOF: Use auto-cleanup for firmware loading

Simplify the code to manage the firmware loading with __free(firmware)
and __free(kfree) auto-cleanups for the firmware data and the temporary
string or array.

Only the code refactoring, no functional changes.

Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Bard Liao <yung-chuan.liao@linux.intel.com>
Cc: Daniel Baluta <daniel.baluta@nxp.com>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Cc: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260806140006.1412298-32-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>