defconfig : enable quota feature for MSM8996

The recent Android upgrade mandates disk quota feature to be enabled by
default on /data. Hence, enable the required kernel config options to
support the same.

Change-Id: I5d50c71a1758f43ec4312081f5944cb758b927b5
Signed-off-by: Ankit Jain <jankit@codeaurora.org>