icnss: Add icnss platform driver support for WLAN

This is a snapshot of the icnss driver and
associated files as of msm-4.4 commit:
commit cc193eec69d7 ("icnss: Use fixed memory region
for WLAN MSA0 memory").

CRs-Fixed: 2073915
Change-Id: I062769b437cc2d03d2e2ce160365e76fd745e36f
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>