ASoC: cs42l42: Don't set defaults for volatile registers

Volatile registers don't need a default value.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 2c394ca7 ("ASoC: Add support for CS42L42 codec")
Link: https://lore.kernel.org/r/20211015133619.4698-5-rf@opensource.cirrus.com


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