mfd: ab8500-debugfs: Pass the IRQF_ONESHOT flag

Since commit 1c6c69525b ("genirq: Reject
bogus threaded irq requests") threaded IRQs without a primary handler
need to be requested with IRQF_ONESHOT, otherwise the request will fail.

So pass the IRQF_ONESHOT flag in this case.

The semantic patch that makes this change is available
in scripts/coccinelle/misc/irqf_oneshot.cocci.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/ab8500-debugfs.c

@@ -2885,7 +2885,7 @@ static ssize_t ab8500_subscribe_write(struct file *file,
 	}
 
 	err = request_threaded_irq(user_val, NULL, ab8500_debug_handler,
-				   IRQF_SHARED | IRQF_NO_SUSPEND,
+				   IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
 				   "ab8500-debug", &dev->kobj);
 	if (err < 0) {
 		pr_info("request_threaded_irq failed %d, %lu\n",