netdevice: Kill netdev->priv

This is the last shoot of this series.
After I removing all directly reference of netdev->priv, I am killing
"priv" of "struct net_device" and fixing relative comments/docs.

Anyone will not be allowed to reference netdev->priv directly.
If you want to reference the memory of private data, use netdev_priv()
instead.
If the private data is not allocted when alloc_netdev(), use
netdev->ml_priv to point that memory after you creating that private
data.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/pci-skeleton.c b/drivers/net/pci-skeleton.c
index b23b5c3..c95fd72 100644
--- a/drivers/net/pci-skeleton.c
+++ b/drivers/net/pci-skeleton.c
@@ -781,7 +781,7 @@
 	dev->irq = pdev->irq;
 	dev->base_addr = (unsigned long) ioaddr;
 
-	/* dev->priv/tp zeroed and aligned in alloc_etherdev */
+	/* netdev_priv()/tp zeroed and aligned in alloc_etherdev */
 	tp = netdev_priv(dev);
 
 	/* note: tp->chipset set in netdrv_init_board */