i40e: Refine an error message to avoid confusion

Change a warning message to indicate what may have really happened when
the init_shared_code call fails.

Change-ID: I616ace40fed120d0dec86dfc91ab2d7cde466904
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -9767,7 +9767,8 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	err = i40e_init_shared_code(hw);
 	if (err) {
-		dev_info(&pdev->dev, "init_shared_code failed: %d\n", err);
+		dev_warn(&pdev->dev, "unidentified MAC or BLANK NVM: %d\n",
+			 err);
 		goto err_pf_reset;
 	}