drivers/rtc/interface.c: fix for fix of alarm initialization

drivers/rtc/interface.c: fix for fix of alarm initialization

Seems the previous patch "fix infinite loop in initializing the alarm"
did break the infinite loop in alarm initialization, but not in the right
way. The loop indeed should walk through the not-leap years and stop on
the leap one.

This patch does apply on top of the previous one.

Signed-off-by: Ales Novak <alnovak@suse.cz>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>