ASoC: rt5682: Add a new property for the DMIC clock driving

The patch adds a new property to set the DMIC clock driving.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20201113055400.11242-1-oder_chiou@realtek.com


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