msm8660: Add support to shutdown the device in case of RTC alarm.

Change-Id: Idb0d42b2e7bc662d608edc6eb4eb41ebbf80d244
diff --git a/platform/msm_shared/smem.h b/platform/msm_shared/smem.h
index 63fbabf..85da9f1 100644
--- a/platform/msm_shared/smem.h
+++ b/platform/msm_shared/smem.h
@@ -297,5 +297,6 @@
 
 /* Power on reason/status info */
 #define PWR_ON_EVENT_USB_CHG 0x20
+#define PWR_ON_EVENT_RTC_ALARM 0x2
 
 #endif /* __PLATFORM_MSM_SHARED_SMEM_H */