drivers/net: Remove alloc_etherdev error messages

alloc_etherdev has a generic OOM/unable to alloc message.
Remove the duplicative messages after alloc_etherdev calls.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index f801754..493cc62 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -1373,10 +1373,8 @@
 
 	/* Init network device */
 	ndev = alloc_etherdev(sizeof(struct board_info));
-	if (!ndev) {
-		dev_err(&pdev->dev, "could not allocate device.\n");
+	if (!ndev)
 		return -ENOMEM;
-	}
 
 	SET_NETDEV_DEV(ndev, &pdev->dev);