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/arcnet/arc-rawmode.c b/drivers/net/arcnet/arc-rawmode.c
index 60088b3..3ff9aff 100644
--- a/drivers/net/arcnet/arc-rawmode.c
+++ b/drivers/net/arcnet/arc-rawmode.c
@@ -87,7 +87,7 @@
 static void rx(struct net_device *dev, int bufnum,
 	       struct archdr *pkthdr, int length)
 {
-	struct arcnet_local *lp = dev->priv;
+	struct arcnet_local *lp = netdev_priv(dev);
 	struct sk_buff *skb;
 	struct archdr *pkt = pkthdr;
 	int ofs;
@@ -167,7 +167,7 @@
 static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
 		      int bufnum)
 {
-	struct arcnet_local *lp = dev->priv;
+	struct arcnet_local *lp = netdev_priv(dev);
 	struct arc_hardware *hard = &pkt->hard;
 	int ofs;