iwlwifi: mvm: purge the BSS table upon firmware load

When the firmware is loaded, its internal timer (GP2) is
reset and all the time_sync in the BSS table is now
unusable. Ask cfg80211 to purge the BSS table.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201209231352.1b703b6f4c05.I0b5c51aa87e86c964e2eae6d959a96e232840ef5@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

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

@@ -402,6 +402,14 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
 	iwl_fw_set_dbg_rec_on(&mvm->fwrt);
 #endif
 
+	/*
+	 * All the BSSes in the BSS table include the GP2 in the system
+	 * at the beacon Rx time, this is of course no longer relevant
+	 * since we are resetting the firmware.
+	 * Purge all the BSS table.
+	 */
+	cfg80211_bss_flush(mvm->hw->wiphy);
+
 	return 0;
 }