1Hz interrupt is never unmasked, so no interrupts appears.  This patch
fix this issue.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 
        priv->valid = !rtcrst_pending;
 
-       ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_1HZ,
+       ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_1HZ,
                        mc13xxx_rtc_update_handler, DRIVER_NAME, priv);
        if (ret)
                goto err_reset_irq_status;