defconfig: Add WCNSS flags for 8937 target

Add WCNSS flags to Enable WCNSS platform driver
for 8937 target on 32 bit environment.

CRs-Fixed: 932142
Change-Id: Ie3ed9df0fb2a6f7e4fbdef1ef3a65935ff8202b0
Signed-off-by: Anand N Sunkad <asunka@codeaurora.org>