msm: ipa: enable data path optimization for WAN_PROD

Enable the optimized scheme of aggregating completion
for WAN_PROD pipe.

Change-Id: I8ea4b22c6152fbab527d55041728cc39aa52333d
CRs-Fixed: 2022853
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>