cnss_utils: Add support of cnss_utils for WLAN

Add support of cnss_utils for WLAN. Export APIs to WLAN
host driver which are used to set/get WLAN related
information. These information could be retrived later
when WLAN driver is reloaded.

CRs-Fixed: 2060693
Change-Id: I2c8c36602ec8af133946ff00c41ce648a2628041
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>