irqchip/zevio: Use irq_data_get_chip_type() helper

Use irq_data_get_chip_type() instead of container_of().

Signed-off-by: Geliang Tang <[e-mail]>
Cc: Jason Cooper <[e-mail]>
Cc: Marc Zyngier <[e-mail]>
Link: http://lkml.kernel.org/r/4cc[e-mail]
Signed-off-by: Thomas Gleixner <[e-mail]>

drivers/irqchip/irq-zevio.c

···
 static void zevio_irq_ack(struct irq_data *irqd)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(irqd);
-	struct irq_chip_regs *regs =
-		&container_of(irqd->chip, struct irq_chip_type, chip)->regs;
+	struct irq_chip_regs *regs = &irq_data_get_chip_type(irqd)->regs;
 
 	readl(gc->reg_base + regs->ack);
 }