[qca-nss-drv] Add doxygen comments for nss_wifi_if

Clarrified comments about nss_wifi_if.h

Change-Id: I6c061bc289a6a7536bdb444df156a062b2f1c2eb
Signed-off-by: Radha krishna Simha Jiguru <rjiguru@codeaurora.org>
1 file changed