ASoC: wcd9xxx: Setup internal micbias for headset detection

If recording is also using internal micbias, then after recording
ends, the dapm widget power down callback will reset the state of
internal micbias in codec register. To avoid such issues make sure
internal micbias is setup whenever detection occurs.

CRs-Fixed: 551575
Change-Id: I92ec4f622677fd9f57e75c64617f13f3cb741442
Signed-off-by: Simmi Pateriya <simmip@codeaurora.org>