ASoC: dmic: Allow GPIO operations to sleep

If there is a power GPIO provided we control it from DAPM context so there
is no problem with a sleeping GPIO, use the _cansleep() version of the API
to allow this.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200422083550.50711-1-broonie@kernel.org


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