cfg80211: Add feature flag for Fast Initial Link Setup (FILS) as STA

This defines a feature flag that drivers can use to indicate that they
support FILS authentication/association (IEEE 802.11ai) when using user
space SME (NL80211_CMD_AUTHENTICATE) in station mode.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/uapi/linux/nl80211.h

@@ -4647,6 +4647,8 @@ enum nl80211_feature_flags {
  *	configuration (AP/mesh) with HT rates.
  * @NL80211_EXT_FEATURE_BEACON_RATE_VHT: Driver supports beacon rate
  *	configuration (AP/mesh) with VHT rates.
+ * @NL80211_EXT_FEATURE_FILS_STA: This driver supports Fast Initial Link Setup
+ *	with user space SME (NL80211_CMD_AUTHENTICATE) in station mode.
  *
  * @NUM_NL80211_EXT_FEATURES: number of extended features.
  * @MAX_NL80211_EXT_FEATURES: highest extended feature index.
@@ -4661,6 +4663,7 @@ enum nl80211_ext_feature_index {
 	NL80211_EXT_FEATURE_BEACON_RATE_LEGACY,
 	NL80211_EXT_FEATURE_BEACON_RATE_HT,
 	NL80211_EXT_FEATURE_BEACON_RATE_VHT,
+	NL80211_EXT_FEATURE_FILS_STA,
 
 	/* add new features before the definition below */
 	NUM_NL80211_EXT_FEATURES,