wifi: cfg80211: add support for IEEE 802.1X Authentication Protocol

wifi: cfg80211: add support for IEEE 802.1X Authentication Protocol

Add an extended feature flag NL80211_EXT_FEATURE_IEEE8021X_AUTH to
allow a driver to indicate support for the IEEE 802.1X authentication
protocol in non-AP STA mode, as defined in
"IEEE P802.11bi/D4.0, 12.16.5".

In case of SME in userspace, the Authentication frame body is prepared
in userspace while the driver finalizes the Authentication frame once
it receives the required fields and elements. The driver indicates
support for IEEE 802.1X authentication using the extended feature flag
so that userspace can initiate IEEE 802.1X authentication.

When the feature flag is set, process IEEE 802.1X Authentication frames
from userspace in non-AP STA mode. If the flag is not set, reject
IEEE 802.1X Authentication frames.

Define a new authentication type NL80211_AUTHTYPE_IEEE8021X for
IEEE 802.1X authentication.

Signed-off-by: Kavita Kavita <kavita.kavita@oss.qualcomm.com>
Link: https://patch.msgid.link/20260226185553.1516290-4-kavita.kavita@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>