[PORT FROM R2] rtc-mrst: Migrate legacy suspend/resume callbacks of rtc driver to...

[PORT FROM R2] rtc-mrst: Migrate legacy suspend/resume callbacks of rtc driver to dev_pm_ops.

BZ: 2607

rtc driver uses legacy suspend/resume callbacks.
Migrate them to dev_pm_ops.do not use legacy for D3 suspend/resume callbacks

Change-Id: I8003640c25b35f3d8a721597762967ac77920283
Orig-Change-Id: If0397defee1966b6a153e4849f212ecd8f5c6d05
Signed-off-by: he bo <bo.he@intel.com>
Signed-off-by: Loic Martin <loicx.martin@intel.com>
Reviewed-on: http://android.intel.com:8080/32683
Reviewed-by: Mansoor, Illyas <illyas.mansoor@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>