rtc: max77663: fix alarm reading bug

rtc: max77663: fix alarm reading bug

When reading alarm of RTC-max77663, it didn't set alrm->enabled correctly,
if irq is masked, means disable alarm, alrm->enabled should be set to 0,
else it should be 1.

Change-Id: Id0b1ffd9a816643712f33624d7d52cbe7b66b3c3
Signed-off-by: Daniel Fu <danifu@nvidia.com>
Reviewed-on: http://git-master/r/129593
(cherry picked from commit e81b06d36a924dcdf8bb0456e7a50d1634d0365f)

Signed-off-by: Kerwin Wan <kerwinw@nvidia.com>
Change-Id: I21eb95bd6c051963db22e9b4494c6b59c79ae17c
Reviewed-on: http://git-master/r/131124
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Rebase-Id: R38146862894845a5f02698d6865d97ddd82b2db1