net: cnss_utils: Add snapshot of cnss_utils driver

This is a snapshot of cnss_utils driver and associated files as of
msm-4.19 commit 6cc9b3862ef5
("net: cnss_utils: Add snapshot of cnss_utils driver").

Change Kconfig from bool to tristate to support building as a module.

Change-Id: Ib1caee8efcd19055e6a27bad3996349510d0022d
CRs-Fixed: 2500800
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>