ASoC: bolero: Fix audio mute during first 4-5 seconds in headset record

Audio mute is observed if record is started as soon as headset
is inserted. This is because hold time after button release is set
as 800ms causing the delay. Change hold time to 200ms to fix this issue.

Change-Id: I98028fca3412a3d47ad8e5154f25ff1726426955
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>