net/sun3_82586: Fix return value of sun3_82586_probe()

drivers/net/ethernet/i825xx/sun3_82586.c: In function ‘sun3_82586_probe’:
drivers/net/ethernet/i825xx/sun3_82586.c:317:9: warning: returning ‘struct net_device *’ from a function with return type ‘int’ makes integer from pointer without a cast [-Wint-conversion]
  317 |  return dev;
      |         ^~~

The return type of sun3_82586_probe() was changed, but one return value
was forgotten to be updated.

Fixes: e179d78e ("m68k: remove legacy probing")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/i825xx/sun3_82586.c

@@ -314,7 +314,7 @@ static int __init sun3_82586_probe(void)
 	err = register_netdev(dev);
 	if (err)
 		goto out2;
-	return dev;
+	return 0;
 
 out2:
 	release_region(ioaddr, SUN3_82586_TOTAL_SIZE);