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

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: 33cef92 ("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>

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

@@ -4444,10 +4444,6 @@ static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
 		sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
 	}
 
-	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;