rtc: qmsi: Adds device suspend/resume to rtc_qmsi device This adds some basic suspend/resume support in the rtc qmsi driver. This is part of a change to enable device suspend/resume and Deep Sleep support in sample application. Jira: ZEP-512 Change-Id: I79ccfb56de5b3cbfb5bc91e9cacca68554aa46ee Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>