net: cnss_utils: Add snapshot of cnss_utils driver

This is a snapshot of cnss_utils driver and associated files as of
msm-4.14 commit bea9b04a157b
("cnss_utils: Add support for derived MAC address").

Checkpatch issues are also fixed on top of this commit.

CRs-Fixed: 2375545
Change-Id: Ic2b2824ccf642f6becb9569c42b58178300de320
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>