[Docs] Add wifi docs
[Docs] Add wifi docs

The wifi client had changed locations so added new document
location to the doxygen generation.

Resolves: LE-13779 LE-13655
Change-Id: I01e77303a7e8308d5ec89ee791b65639b8e3d3d5

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af