powerpc: cpm2_pic: Use IRQCHIP_EOI_IF_HANDLED

The core code provides the same functionality when the
IRQCHIP_EOI_IF_HANDLED flag is set for the irq chip.

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

arch/powerpc/sysdev/cpm2_pic.c

@@ -115,14 +115,9 @@ static void cpm2_ack(struct irq_data *d)
 
 static void cpm2_end_irq(struct irq_data *d)
 {
-	struct irq_desc *desc;
 	int	bit, word;
 	unsigned int irq_nr = virq_to_hw(d->irq);
 
-	desc = irq_to_desc(irq_nr);
-	if (!(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS))
-			&& desc->action) {
-
 	bit = irq_to_siubit[irq_nr];
 	word = irq_to_siureg[irq_nr];
 
@@ -134,7 +129,6 @@ static void cpm2_end_irq(struct irq_data *d)
 	 * systems.
 	 */
 	mb();
-	}
 }
 
 static int cpm2_set_irq_type(struct irq_data *d, unsigned int flow_type)
@@ -202,6 +196,7 @@ static struct irq_chip cpm2_pic = {
 	.irq_ack = cpm2_ack,
 	.irq_eoi = cpm2_end_irq,
 	.irq_set_type = cpm2_set_irq_type,
+	.flags = IRQCHIP_EOI_IF_HANDLED,
 };
 
 unsigned int cpm2_get_irq(void)