powerpc: Use proper accessors for IRQ_* flags

Use the proper accessors instead of open access to irq_desc.
Converted with coccinelle.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/powerpc/sysdev/i8259.c

@@ -175,12 +175,12 @@ static int i8259_host_map(struct irq_host *h, unsigned int virq,
 
 	/* We block the internal cascade */
 	if (hw == 2)
-		irq_to_desc(virq)->status |= IRQ_NOREQUEST;
+		irq_set_status_flags(virq, IRQ_NOREQUEST);
 
 	/* We use the level handler only for now, we might want to
 	 * be more cautious here but that works for now
 	 */
-	irq_to_desc(virq)->status |= IRQ_LEVEL;
+	irq_set_status_flags(virq, IRQ_LEVEL);
 	set_irq_chip_and_handler(virq, &i8259_pic, handle_level_irq);
 	return 0;
 }