gpio: davinci: use irq_data_get_chip_type

Use irq_data_get_chip_type() instead of container_of().

Signed-off-by: Geliang Tang <geliangtang@163.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-davinci.c

@@ -432,8 +432,7 @@ static struct irq_chip *davinci_gpio_get_irq_chip(unsigned int irq)
 {
 	static struct irq_chip_type gpio_unbanked;
 
-	gpio_unbanked = *container_of(irq_get_chip(irq),
-				      struct irq_chip_type, chip);
+	gpio_unbanked = *irq_data_get_chip_type(irq_get_irq_data(irq));
 
 	return &gpio_unbanked.chip;
 };