drivers/net/ipg.c: remove exceptional & on function name

In this file, function names are otherwise used as pointers without &.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r@
identifier f;
@@

f(...) { ... }

@@
identifier r.f;
@@

- &f
+ f
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ipg.c

@@ -1751,7 +1751,7 @@ static int ipg_nic_open(struct net_device *dev)
 	/* Register the interrupt line to be used by the IPG within
 	 * the Linux system.
 	 */
-	rc = request_irq(pdev->irq, &ipg_interrupt_handler, IRQF_SHARED,
+	rc = request_irq(pdev->irq, ipg_interrupt_handler, IRQF_SHARED,
 			 dev->name, dev);
 	if (rc < 0) {
 		printk(KERN_INFO "%s: Error when requesting interrupt.\n",