msm: ipa: Change BAM event threshold towards USB consumer pipe

Due to ZLT issue with USB 3.0 core, BAM threshold need to be set
to larger than single frame size. Assuming max aggregation size
as 16K, set the threshold to 16k+1.

Change-Id: Ia545c525a4cc6e0981e3d23aa9cc0e33a4cb4efe
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Ravinder Konka <rkonka@codeaurora.org>