cxgb3 - Remove BUG_ON from t3b_intr_napi

In some cases, SG_DATA_INTR won't clear on read and the following
interrupt may cause us to assert because NAPI is already scheduled.
Remove the assertion, NAPI can handle attempts to rearm it while
it's already scheduled.
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/cxgb3/sge.c

@@ -2199,14 +2199,12 @@ static irqreturn_t t3b_intr_napi(int irq, void *cookie)
 	if (likely(map & 1)) {
 		dev = adap->sge.qs[0].netdev;
 
-		BUG_ON(napi_is_scheduled(dev));
 		if (likely(__netif_rx_schedule_prep(dev)))
 			__netif_rx_schedule(dev);
 	}
 	if (map & 2) {
 		dev = adap->sge.qs[1].netdev;
 
-		BUG_ON(napi_is_scheduled(dev));
 		if (likely(__netif_rx_schedule_prep(dev)))
 			__netif_rx_schedule(dev);
 	}