ASoC: wcd: avoid noise during recording

If micbias is disabled during headset detection
while recording is happening through handset, it results
in noise in recorded data.So make sure micbias is
not disabled during recording.

CRs-Fixed: 689844
Change-Id: I6fa56770e365553603021f9e3ac713ccfc67d38b
Signed-off-by: Simmi Pateriya <simmip@codeaurora.org>