ALSA: HDA: Add access description in __snd_hda_add_vmaster

Add description for access parameter in __snd_hda_add_vmaster()
to prevent the compilation warning:
warning: Function parameter or member 'access' not described in '__snd_hda_add_vmaster'

Fixes: e65bf997 ("ALSA: HDA - remove the custom implementation for the audio LED trigger")
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20210409214616.1539685-1-ranjani.sridharan@linux.intel.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.c

@@ -1938,6 +1938,7 @@ static int add_follower(struct hda_codec *codec,
  * @followers: follower control names (optional)
  * @suffix: suffix string to each follower name (optional)
  * @init_follower_vol: initialize followers to unmute/0dB
+ * @access: kcontrol access rights
  * @ctl_ret: store the vmaster kcontrol in return
  *
  * Create a virtual master control with the given name.  The TLV data