sa1100_ir: fix build breakage

Fix simple typo. Caused by commit
a1de966682551debbe690672e760487cc555c05f
("irda/sa1100_ir: convert to net_device_ops").

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/sa1100_ir.c

@@ -925,7 +925,7 @@ static int sa1100_irda_probe(struct platform_device *pdev)
 		goto err_mem_5;
 
 	dev->netdev_ops	= &sa1100_irda_netdev_ops;
-	dev->ir		= IRQ_Ser2ICP;
+	dev->irq	= IRQ_Ser2ICP;
 
 	irda_init_max_qos_capabilies(&si->qos);