mediatek: mt8195: add rtc power off sequence

mt8195 also uses mt6359p RTC. Revice mt8192 RTC and share the
driver with mt8195.

Change-Id: I20c73f6e0af67ef9d4c3d4e0ff373f93950e07db
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
diff --git a/plat/mediatek/mt8195/plat_pm.c b/plat/mediatek/mt8195/plat_pm.c
index 7cc2565..522d443 100644
--- a/plat/mediatek/mt8195/plat_pm.c
+++ b/plat/mediatek/mt8195/plat_pm.c
@@ -20,6 +20,7 @@
 #include <plat_params.h>
 #include <plat_pm.h>
 #include <pmic.h>
+#include <rtc.h>
 
 /*
  * Cluster state request:
@@ -355,6 +356,7 @@
 {
 	INFO("MTK System Off\n");
 
+	rtc_power_off_sequence();
 	pmic_power_off();
 
 	wfi();