msm: ais: fix to enqueue current sof timestamp

Fix to enqueue current sof timestamp instead of previous frame.

Change-Id: I673d057ebed3062f908bbb490a82313743721512
Acked-by: Abderahmane Allalou <aallalou@qti.qualcomm.com>
Signed-off-by: Terence Ho <terenceh@codeaurora.org>