net/at91_ether: use gpio_to_irq for phy IRQ line

Use the gpio_to_irq() function to retrieve the phy IRQ line
from the GPIO pin specification.
This fix is needed now that we have moved to irqdomains on AT91.

Reported-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <avictor.za@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cadence/at91_ether.c

@@ -263,7 +263,7 @@ static void enable_phyirq(struct net_device *dev)
 		return;
 	}
 
-	irq_number = lp->board_data.phy_irq_pin;
+	irq_number = gpio_to_irq(lp->board_data.phy_irq_pin);
 	status = request_irq(irq_number, at91ether_phy_interrupt, 0, dev->name, dev);
 	if (status) {
 		printk(KERN_ERR "at91_ether: PHY IRQ %d request failed - status %d!\n", irq_number, status);
@@ -363,7 +363,7 @@ static void disable_phyirq(struct net_device *dev)
 	disable_mdi(lp);
 	spin_unlock_irq(&lp->lock);
 
-	irq_number = lp->board_data.phy_irq_pin;
+	irq_number = gpio_to_irq(lp->board_data.phy_irq_pin);
 	free_irq(irq_number, dev);			/* Free interrupt handler */
 }
 
@@ -1234,7 +1234,7 @@ static int at91ether_suspend(struct platform_device *pdev, pm_message_t mesg)
 
 	if (netif_running(net_dev)) {
 		if (gpio_is_valid(lp->board_data.phy_irq_pin)) {
-			int phy_irq = lp->board_data.phy_irq_pin;
+			int phy_irq = gpio_to_irq(lp->board_data.phy_irq_pin);
 			disable_irq(phy_irq);
 		}
 
@@ -1258,7 +1258,7 @@ static int at91ether_resume(struct platform_device *pdev)
 		netif_start_queue(net_dev);
 
 		if (gpio_is_valid(lp->board_data.phy_irq_pin)) {
-			int phy_irq = lp->board_data.phy_irq_pin;
+			int phy_irq = gpio_to_irq(lp->board_data.phy_irq_pin);
 			enable_irq(phy_irq);
 		}
 	}