ALSA: core: pcm_iec958: fix kernel-doc

Fix W=1 warning. The kernel doc uses the hwparams type instead of the
argument name.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200702193842.169215-1-pierre-louis.bossart@linux.intel.com


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