s390/qdio: remove unneeded siga-sync for Output Queue

get_outbound_buffer_frontier() is only reached via qdio_inspect_queue(),
and there we already call qdio_siga_sync_q() unconditionally.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

drivers/s390/cio/qdio_main.c

@@ -516,13 +516,6 @@ static int get_outbound_buffer_frontier(struct qdio_q *q, unsigned int start,
 
 	q->timestamp = get_tod_clock_fast();
 
-	if (need_siga_sync(q))
-		if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
-		    !pci_out_supported(q->irq_ptr)) ||
-		    (queue_type(q) == QDIO_IQDIO_QFMT &&
-		    multicast_outbound(q)))
-			qdio_siga_sync_q(q);
-
 	count = atomic_read(&q->nr_buf_used);
 	if (!count)
 		return 0;