ALSA: pci: mixart: fix kernel-doc warning

make W=1 warning:

sound/pci/mixart/mixart_hwdep.c:36: warning: expecting prototype for
exit with a timeout(). Prototype was for
mixart_wait_nice_for_register_value() instead

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210302215430.87309-3-pierre-louis.bossart@linux.intel.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>