defconfig: wcnss: Enable wcnss pre-alloc memory

Enable support for pre-alloc memory for WLAN driver.

Change-Id: I0a18cfcfeb23538e6e0b2f5144f686b26170e1d1
CRs-Fixed: 369983
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>
Signed-off-by: Sridhar Gujje <sgujje@codeaurora.org>
wcnss: Pre-alloc memory for WLAN driver

WLAN driver will use this pre-allocated memory (when available) for
large memory allocations; this will prevent WLAN driver load
failures because of the un-availability of the large size slabs
during module load.

Change-Id: I8a8139bdf343ddc871036f6d5c6ab90993816de0
CRs-Fixed: 369983
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>
Signed-off-by: Sridhar Gujje <sgujje@codeaurora.org>