msm: ipa: ZLT issue workaround

Due to ZLT issue with USB 3.0 core, BAM threashold need to be set
to max packet size value. After setting the threshold, USB core
will not be notified on ZLT

Change-Id: I80c56119e10391e3c1791752b1b7d8a426bc79b0
CRs-Fixed: 561728
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Gidon Studinski <gidons@codeaurora.org>