(CR): alarmtimer: add debug to identify alarmtimers

Based on KBA-200505201040

Print out timer wake-up info to debug the sources
of pm8xxx_rtc_alarm wake-ups.

Change-Id: I39f24dad0613a08844eefcd25076831589256e52
Signed-off-by: Ryan Lattrel <ryanl@motorola.com>
Reviewed-on: https://gerrit.mot.com/1668046


SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Ling Jin <lingjin@motorola.com>
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1778266


Reviewed-by: Huosheng Liao <liaohs@motorola.com>