ALSA: pcm: Fix document for snd_pcm_stop_xrun()

Fix a copy & paste error:
 Warning(sound/core/pcm_native.c:1112): Excess function parameter 'state' description in 'snd_pcm_stop_xrun'

The state argument was dropped from snd_pcm_stop_xrun().

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a3d1221..095d957 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1101,7 +1101,6 @@
 /**
  * snd_pcm_stop_xrun - stop the running streams as XRUN
  * @substream: the PCM substream instance
- * @state: PCM state after stopping the stream
  *
  * This stops the given running substream (and all linked substreams) as XRUN.
  * Unlike snd_pcm_stop(), this function takes the substream lock by itself.