dccp: do not assume DCCP code is non preemptible

DCCP uses the generic backlog code, and this will soon
be changed to not disable BH when protocol is called back.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/input.c

@@ -359,7 +359,7 @@ send_sync:
 		goto discard;
 	}
 
-	__DCCP_INC_STATS(DCCP_MIB_INERRS);
+	DCCP_INC_STATS(DCCP_MIB_INERRS);
 discard:
 	__kfree_skb(skb);
 	return 0;