asoc: codecs: Update LPM voting support for vdd-mic-bias-supply

For power saving during RBSC, need to vote for minimum
or zero current on load for respective regulator to
enter LPM mode. Add required support from rouleur
to vote for mic bias accordingly during suspend/resume.

Change-Id: Idb2accbc77241e19f688225081e1b68b99c19e29
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>