IPoIB: Rewrite "if (!likely(...))" as "if (unlikely(!(...)))"

    
It's too hard to figure out what "!likely(...)" really means, and who
knows how compilers interpret the hint.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/ipoib/ipoib_cm.c

@@ -434,7 +434,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
 		goto repost;
 	}
 
-	if (!likely(wr_id & IPOIB_CM_RX_UPDATE_MASK)) {
+	if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) {
 		p = wc->qp->qp_context;
 		if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) {
 			spin_lock_irqsave(&priv->lock, flags);