ASoC: WCD9310: Switch CFILT mode based on Microphone Bias

CFILT can be configured either to be in fast mode or in slow
mode. It is required that CFILT to be in fast mode for headset
insertion /removal to be detected properly. Whereas it is required
for CFILT to be in slow mode when recording is in progress.

Add logic to decipher when CFILT used for MBHC is getting turned on for
recording purpose and change the CFILT modes dynamically.

CRs-Fixed: 317473
CRs-Fixed: 317479
Change-Id: I4b6446d1c3bbf36507f83c89e492d28354a169d5
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>