arcnet: convert to internal stats

Use pre-existing network_device_stats inside network_device rather than own
private structure.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.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 3ff9aff..da017cb 100644
--- a/drivers/net/arcnet/arc-rawmode.c
+++ b/drivers/net/arcnet/arc-rawmode.c
@@ -102,7 +102,7 @@
 	skb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
 	if (skb == NULL) {
 		BUGMSG(D_NORMAL, "Memory squeeze, dropping packet.\n");
-		lp->stats.rx_dropped++;
+		dev->stats.rx_dropped++;
 		return;
 	}
 	skb_put(skb, length + ARC_HDR_SIZE);