net: ll_temac: fix interrupt bug when interrupt 0 is used

The code is not checking the interrupt for DMA correctly so that an
interrupt number of 0 will cause a false error.
Signed-off-by: NBrian Hill <brian.hill@xilinx.com>
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ll_temac_main.c

@@ -950,7 +950,7 @@ temac_of_probe(struct of_device *op, const struct of_device_id *match)
 
 	lp->rx_irq = irq_of_parse_and_map(np, 0);
 	lp->tx_irq = irq_of_parse_and_map(np, 1);
-	if (!lp->rx_irq || !lp->tx_irq) {
+	if ((lp->rx_irq == NO_IRQ) || (lp->tx_irq == NO_IRQ)) {
 		dev_err(&op->dev, "could not determine irqs\n");
 		rc = -ENOMEM;
 		goto nodev;