This adds support for the WPA3-Enterprise mode authentication.
The settings for the WPA3-Enterpriese mode are defined in
WPA3_Specification_v1.0.pdf. This mode also requires ieee80211w and
guarantees at least 192 bit of security.
This does not increase the ipkg size by a significant size.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>