msm: rndis_ipa: set de-aggregation as disabled by default

This change disables the IPA core de-aggregation.
This is a WA for a possible HW bug in IPA HW.
The WA is to avoid doing de-aggregation in HW.

Change-Id: Ia879391961136ff8e04c24dffc0682366c76ccfe
Signed-off-by: Talel Shenhar <stalel@codeaurora.org>