msm: ipa: add support for AGGR_SW_EOF_ACTIVE

Configure AGGR_SW_EOF_ACTIVE for WAN_CONS pipe in order to
allow modem to close aggregation on this pipe.
This is needed in order for modem to ensure
a QMAP command packet always resides in the end of aggregated frame.

Change-Id: I7412f1f0af8d2109853e311de815a1f1ec3220e3
CRs-Fixed: 979484
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>