ASoC: wcd_mbhc_v2: fix the mute issue in voice call post SSR

On triggering the SSR the mbhc driver doesn't refresh the status of the
plug type detection. This causes detection to be treated as the
fake button press resulting in apps enabling the mute in voice call.
Fix by updating the plug type status in the stop call to mbhc driver.

CRs-Fixed: 747589
Change-Id: I188998bba541d90d0458ed1a1c532d179b9a3cca
Signed-off-by: Aviral Gupta <aviralg@codeaurora.org>