cnss_utils: Add cnss_utils support for WLAN

This is a snapshot of the cnss_utils driver and
associated files as of msm-4.9 commit:
commit 99131f0c0355 ("cnss_utils: Zero out cnss_utils
priv structure during initalization").

CRs-Fixed: 2074029
Change-Id: I48327858323eec43a53c4afc07a082e34bd15978
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>