ASoC: max98090: revert invalid fix for handling SHDN

Reverts commit 62d5ae4c ("ASoC: max98090: save and restore
SHDN when changing sensitive registers").

A critical side-effect was observed: when keep playing something,
the recorded sound has chance to break (clipping).

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200214105744.82258-2-tzungbi@google.com


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