ax88796: remove memset of private data

It's allocated via alloc_netdev, thus already zeroed.
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

drivers/net/ax88796.c

@@ -858,8 +858,6 @@ static int ax_probe(struct platform_device *pdev)
 	ei_local = netdev_priv(dev);
 	ax = to_ax_dev(dev);
 
-	memset(ax, 0, sizeof(struct ax_device));
-
 	spin_lock_init(&ax->mii_lock);
 
 	ax->dev = pdev;