staging: octeon: Fix line 80 characters in ethernet.c

The following patch fixes the checpatch.pl warning:
WARNING: line over 80 characters
Signed-off-by: Esra Altintas <es.altintas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon/ethernet.c

@@ -720,7 +720,8 @@ static int cvm_oct_probe(struct platform_device *pdev)
 			struct net_device *dev =
 			    alloc_etherdev(sizeof(struct octeon_ethernet));
 			if (!dev) {
-				pr_err("Failed to allocate ethernet device for port %d\n", port);
+				pr_err("Failed to allocate ethernet device for port %d\n",
+				       port);
 				continue;
 			}