iavf: Replace __FUNCTION__ with __func__

__FUNCTION__ exists only for backwards compatibility reasons with old
gcc versions. Replace it with __func__.
Signed-off-by: Nye xingchen <ye.xingchen@zte.com.cn>
Reviewed-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NKonrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/iavf/iavf_main.c

@@ -4820,7 +4820,7 @@ static void iavf_shutdown(struct pci_dev *pdev)
 		iavf_close(netdev);
 
 	if (iavf_lock_timeout(&adapter->crit_lock, 5000))
-		dev_warn(&adapter->pdev->dev, "failed to acquire crit_lock in %s\n", __FUNCTION__);
+		dev_warn(&adapter->pdev->dev, "%s: failed to acquire crit_lock\n", __func__);
 	/* Prevent the watchdog from running. */
 	iavf_change_state(adapter, __IAVF_REMOVE);
 	adapter->aq_required = 0;