[NET]: Kill eth_copy_and_sum().

It hasn't "summed" anything in over 7 years, and it's
just a straight mempcy ala skb_copy_to_linear_data()
so just get rid of it.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/ppc/8260_io/enet.c b/arch/ppc/8260_io/enet.c
index 4c0a7d7..615b658 100644
--- a/arch/ppc/8260_io/enet.c
+++ b/arch/ppc/8260_io/enet.c
@@ -477,9 +477,9 @@
 		}
 		else {
 			skb_put(skb,pkt_len-4);	/* Make room */
-			eth_copy_and_sum(skb,
+			skb_copy_to_linear_data(skb,
 				(unsigned char *)__va(bdp->cbd_bufaddr),
-				pkt_len-4, 0);
+				pkt_len-4);
 			skb->protocol=eth_type_trans(skb,dev);
 			netif_rx(skb);
 		}