ASoC: SOF: control: fix cppcheck warning in snd_sof_volume_info()

ASoC: SOF: control: fix cppcheck warning in snd_sof_volume_info()

Fix cppcheck warning:

sound/soc/sof/control.c:117:82: style:inconclusive: Function
'snd_sof_volume_info' argument 2 names different: declaration
'ucontrol' definition 'uinfo'. [funcArgNamesDifferent]

Fixes: fca18e62984a ("ASoC: SOF: control: override volume info callback")
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20201204170313.2704499-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>