ASoC: fix kernel-doc warnings in sound/soc/soc-ops.c

Fix kernel-doc warnings in soc-ops.c:

..//sound/soc/soc-ops.c:415: warning: No description found for parameter 'ucontrol'
..//sound/soc/soc-ops.c:415: warning: Excess function parameter 'uinfo' description in 'snd_soc_put_volsw_sx'

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Liam Girdwood <[e-mail]>
Cc: Mark Brown <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/soc-ops.c

···
 /**
  * snd_soc_put_volsw_sx - double mixer set callback
  * @kcontrol: mixer control
- * @uinfo: control element information
+ * @ucontrol: control element information
  *
  * Callback to set the value of a double mixer control that spans 2 registers.
  *