chained_irq_enter/exit() already mask&ack/unmask the chained interrupt.
There is no need to also explicitly do it in the handler.
Signed-off-by: NDaniel Kurtz <djkurtz@chromium.org>
Acked-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>