rtc: rx8025: remove useless initialization

irq_freq is already initialized to 1 in rtc_device_register()

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index 340133a..f9b86b9 100644
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c
@@ -547,7 +547,6 @@
 		}
 	}
 
-	rx8025->rtc->irq_freq = 1;
 	rx8025->rtc->max_user_freq = 1;
 
 	err = rx8025_sysfs_register(&client->dev);