i40e: declare rather than initialize int object

'err' would be overwritten immediately, so we should declare it only
rather than initialize it to zero.

Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -10159,7 +10159,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	static u16 pfs_found;
 	u16 wol_nvm_bits;
 	u16 link_status;
-	int err = 0;
+	int err;
 	u32 len;
 	u32 i;