ASoC: WCD9304: Fix pop level during start of recording

When recording is started, it is observed that the pop level is
much higher than expected. Fix this issue by enabling the High
Pass Filter on microphone path with a cut off frequency of 150Hz
when recording starts and reprogram the cut off frequency back
after a timeout of 300 millisecond.

CRs-fixed: 380966
Change-Id: Ife79ce45c7f2d8c80224fb11aab60d9e4e551357
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>