rtc: canceling an alarm marks it as inactive
rtc: canceling an alarm marks it as inactive

Change-Id: I3c8673276e434cb767dfd6849d32d71001a65efc
Signed-off-by: Jihun Ahn <31fe625dd60d1475d1b18ea57157c450e67c870a@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT