ASoC: wm8996: clarify expression

cppcheck warning:
sound/soc/codecs/wm8996.c:2109:23: style: Clarify calculation
precedence for '/' and '?'. [clarifyCalculation]
  timeout = timeout/2 ? : 1;
                      ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210311004332.120901-9-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>