net: sk_drops consolidation

sock_queue_rcv_skb() can update sk_drops itself, removing need for
callers to take care of it. This is more consistent since
sock_queue_rcv_skb() also reads sk_drops when queueing a skb.

This adds sk_drops managment to many protocols that not cared yet.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index d8375bc..fd737ef 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -381,8 +381,7 @@
 	}
 
 	/* Charge it to the socket. */
-	if (sock_queue_rcv_skb(sk,skb)<0) {
-		atomic_inc(&sk->sk_drops);
+	if (sock_queue_rcv_skb(sk, skb) < 0) {
 		kfree_skb(skb);
 		return NET_RX_DROP;
 	}