[NETROM]: Introduct stuct nr_private

NET/ROM's virtual interfaces don't have a proper private data
structure yet.  Create struct nr_private and put the statistics there.

Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netrom/nr_dev.c b/net/netrom/nr_dev.c
index 909aa7f..4e66eef 100644
--- a/net/netrom/nr_dev.c
+++ b/net/netrom/nr_dev.c
@@ -160,10 +160,9 @@
 
 static int nr_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-	struct net_device_stats *stats = netdev_priv(dev);
-	unsigned int len;
-
-	len = skb->len;
+	struct nr_private *nr = netdev_priv(dev);
+	struct net_device_stats *stats = &nr->stats;
+	unsigned int len = skb->len;
 
 	if (!nr_route_frame(skb, NULL)) {
 		kfree_skb(skb);
@@ -179,7 +178,9 @@
 
 static struct net_device_stats *nr_get_stats(struct net_device *dev)
 {
-	return netdev_priv(dev);
+	struct nr_private *nr = netdev_priv(dev);
+
+	return &nr->stats;
 }
 
 void nr_setup(struct net_device *dev)