netdevice: safe convert to netdev_priv() #part-1

We have some reasons to kill netdev->priv:
1. netdev->priv is equal to netdev_priv().
2. netdev_priv() wraps the calculation of netdev->priv's offset, obviously
   netdev_priv() is more flexible than netdev->priv.
But we cann't kill netdev->priv, because so many drivers reference to it
directly.

This patch is a safe convert for netdev->priv to netdev_priv(netdev).
Since all of the netdev->priv is only for read.
But it is too big to be sent in one mail.
I split it to 4 parts and make every part smaller than 100,000 bytes,
which is max size allowed by vger.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/acenic.c b/drivers/net/acenic.c
index b9d35f6..109eb7c 100644
--- a/drivers/net/acenic.c
+++ b/drivers/net/acenic.c
@@ -466,7 +466,7 @@
 
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
-	ap = dev->priv;
+	ap = netdev_priv(dev);
 	ap->pdev = pdev;
 	ap->name = pci_name(pdev);