iwlwifi: mvm: enable HT/VHT IBSS

For some reason we never enabled it, but it appears to work fine.
Enable it now.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -598,6 +598,9 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 		BIT(NL80211_IFTYPE_ADHOC);
 
 	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
+	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
+	hw->wiphy->features |= NL80211_FEATURE_HT_IBSS;
+
 	hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 	if (iwl_mvm_is_lar_supported(mvm))
 		hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;