[SPARC64]: Kill sparse warning in power.c

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/power.c

@@ -141,8 +141,7 @@ void __init power_init(void)
 		printk("powerd running.\n");
 
 		if (request_irq(edev->irqs[0],
-				power_handler, SA_SHIRQ, "power",
-				(void *) power_reg) < 0)
+				power_handler, SA_SHIRQ, "power", NULL) < 0)
 			printk("power: Error, cannot register IRQ handler.\n");
 	} else {
 		printk("not using powerd.\n");