ASoC: wcd: update GND-MIC swap detection

GND-MIC swap detection needs micbias and schmitt
trigger to be enabled for hardware to indicate
whether a cross connection has been found.

CRs-Fixed: 642944
Change-Id: I1c96ee4a630465c10e7d65913fe9875501f1568d
Signed-off-by: Simmi Pateriya <simmip@codeaurora.org>