msm: ais: stop vfe path on error

Stop vfe path on error to avoid system lockup from flood of
error logs.

Acked-by: Abderahmane Allalou <aallalou@qti.qualcomm.com&gt;.>

Change-Id: I56a7659bdddbf1f40270628503aeece677271858
Signed-off-by: Terence Ho <terenceh@codeaurora.org>