tests/power/multicorei/lmt: Fix RTC configuration

After QMSI 1.4 update, the alarm callback is not saved when
'alarm_en' is set to zero during RTC configuration. So this
patch fixes tests/power/multicore/lmt application according.

ZEP-1778

Change-Id: Ie1468458bc23a6394484aef2aeee97745d5d23b8
Signed-off-by: Andre Guedes <andre.guedes@intel.com>
1 file changed