net: sunhme: Fix uninitialized return code

Fix an uninitialized return code if we never found a qfe slot. It would be
a bug if we ever got into this situation, but it's good to return something
tracable.

Fixes: acb3f35f92 ("sunhme: forward the error code from pci_enable_device()")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sun/sunhme.c

@@ -2834,7 +2834,7 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	int i, qfe_slot = -1;
 	char prom_name[64];
 	u8 addr[ETH_ALEN];
-	int err;
+	int err = -ENODEV;
 
 	/* Now make sure pci_dev cookie is there. */
 #ifdef CONFIG_SPARC