staging: gdm72xx: Remove unnecessary memset of netdev private data

The memory for struct net_device private data is allocated using
kzalloc/vzalloc in alloc_netdev_mqs, thus there is no need to zero it
again in the driver.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm72xx/gdm_wimax.c

@@ -882,8 +882,6 @@ int register_wimax_device(struct phy_dev *phy_dev, struct device *pdev)
 	memcpy(dev->dev_addr, gdm_wimax_macaddr, sizeof(gdm_wimax_macaddr));
 
 	nic = netdev_priv(dev);
-	memset(nic, 0, sizeof(*nic));
-
 	nic->netdev = dev;
 	nic->phy_dev = phy_dev;
 	phy_dev->netdev = dev;