fix(ndp-RX): remove double sync on queue start

The packets received by the driver between these two synces
were ignored in libnfb and even not freed. This could have caused
performance issues (buffer was effectively smaller) or even blockage
of packet receive.

Author: martinspinler

libnfb/include/netcope/ndp.h

@@ -372,9 +372,6 @@ static int nc_ndp_queue_start(void *priv)
 		return ret;
 
 	if (q->channel.type == NDP_CHANNEL_TYPE_RX && q->protocol == 2 && (q->flags & NDP_CHANNEL_FLAG_EXCLUSIVE) == 0) {
-		if ((ret = _ndp_queue_sync(q, &q->sync)))
-			return ret;
-
 		q->u.v2.rhp = q->sync.hwptr;
 	}