ALSA: hda: tas2781: Use auto-cleanup for put_device()

A temporary refcount management of a struct device can be done
gracefully with __clean(put_device) for avoiding potential leaks.

No functional change but just a code cleanup.

Cc: Shenghao Ding <shenghao-ding@ti.com>
Cc: Kevin Lu <kevin-lu@ti.com>
Cc: Baojun Xu <baojun.xu@ti.com>
Cc: Sen Wang <sen@ti.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260803140100.919071-2-tiwai@suse.de