iwlwifi: pcie: claim ownership on the device after stop_device()

Not doing so would allow other possible users of the device
to take ownership and prevent normal WiFi operation.

This fixes the second part of:
https://bugzilla.kernel.org/show_bug.cgi?id=87191Reviewed-by: Moshe Harel <moshe.harel@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/pcie/trans.c

@@ -994,6 +994,9 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
 		clear_bit(STATUS_RFKILL, &trans->status);
 	if (hw_rfkill != was_hw_rfkill)
 		iwl_trans_pcie_rf_kill(trans, hw_rfkill);
+
+	/* re-take ownership to prevent other users from stealing the deivce */
+	iwl_pcie_prepare_card_hw(trans);
 }
 
 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)