ASoC: rt5682: Enable the power of "MICBIAS" and "Vref2" for the DMIC clock

The power of "MICBIAS" and "Vref2" was needed while the DMIC clcok was from
the PLL output.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20200928053912.16664-1-oder_chiou@realtek.com


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