ENGR00320136 net: fec: fix rcv is not last issue when do suspend/resu…

…me test

When do suspend/resume stress test, some log shows "rcv is not +last".
The issue is that enet suspend will disable phy clock, phy link down,
after resume back, enet MAC redo initial and ready to tx/rx packet,
but phy still is not ready which is doing auto-negotiation. When phy
link is not up, don't schdule napi soft irq.

Signed-off-by: Fugang Duan <B38611@freescale.com>

drivers/net/ethernet/freescale/fec_main.c

@@ -1601,7 +1601,7 @@ fec_enet_interrupt(int irq, void *dev_id)
 			fep->work_ts = 0;
 		}
 
-		if (fep->work_tx || fep->work_rx) {
+		if ((fep->work_tx || fep->work_rx) && fep->link) {
 			ret = IRQ_HANDLED;
 
 			/* Disable the RX interrupt */