the test include 2 ztest cases, verfy below apis:
rtc_enable()
rtc_disable()
rtc_read()
rtc_set_config()
rtc_set_alarm()
rtc_get_pending_int()
Change-Id: Ifca2541312c5ec8d450803f1b6e4f5064098e7fe
Signed-off-by: jing wang <jing.j.wang@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>