defconfig: msm8084: Enable 0-4K memory initialization

0-4K memory is reserved for QCA6174 to address a MAC HW bug.
MAC would do an invalid pointer fetch based on the data, that was read
from 0 to 4K. So fill it with zero's; to an address for which PCIe root
complex would honor the read without any errors.

CRs-Fixed: 658944
Change-Id: I475fa52e244cc70de284019761bb2bab4369b1e2
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>