iwlwifi: mvm: support sta_statistics() even on older firmware

BugLink: https://bugs.launchpad.net/bugs/1810967

commit ec484d03 upstream.

The oldest firmware supported by iwlmvm do support getting
the average beacon RSSI. Enable the sta_statistics() call
from mac80211 even on older firmware versions.

Fixes: 33cef925 ("iwlwifi: mvm: support beacon statistics for BSS client")
Cc: stable@vger.kernel.org # 4.2+
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

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

@@ -4050,10 +4050,6 @@ static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 
-	if (!fw_has_capa(&mvm->fw->ucode_capa,
-			 IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
-		return;
-
 	/* if beacon filtering isn't on mac80211 does it anyway */
 	if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
 		return;