[PATCH] rtc: don't reference bogus function pointer in kdoc

[Wolfram Sang <wsa+renesas@sang-engineering.com>]

The mentioned function pointer is long gone since early 2011. Remove the
reference in the comment and reword it slightly.

Fixes: 51ba60c5bb3b ("RTC: Cleanup rtc_class_ops->update_irq_enable()")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

I stumbled over this when trying to understand UIE handling during my
DA9063 debugging session.

 drivers/rtc/interface.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 98d9c87b0d1b..4ac33b931f3d 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -571,10 +571,9 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 	mutex_unlock(&rtc->ops_lock);
 #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
 	/*
-	 * Enable emulation if the driver did not provide
-	 * the update_irq_enable function pointer or if returned
-	 * -EINVAL to signal that it has been configured without
-	 * interrupts or that are not available at the moment.
+	 * Enable emulation if the driver returned -EINVAL to signal that it has
+	 * been configured without interrupts or they are not available at the
+	 * moment.
 	 */
 	if (err == -EINVAL)
 		err = rtc_dev_update_irq_enable_emul(rtc, enabled);
-- 
2.19.1