mediatek: mt8195: add rtc power off sequence

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

Change-Id: I20c73f6e0af67ef9d4c3d4e0ff373f93950e07db
diff --git a/plat/mediatek/mt8195/include/rtc.h b/plat/mediatek/mt8195/include/rtc.h
new file mode 100644
index 0000000..a9c7bc8
--- /dev/null
+++ b/plat/mediatek/mt8195/include/rtc.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2021, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RTC_H
+#define RTC_H
+
+#include <rtc_mt6359p.h>
+
+#endif  /* RTC_H */
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();
diff --git a/plat/mediatek/mt8195/platform.mk b/plat/mediatek/mt8195/platform.mk
index e37e440..4d3ad59 100644
--- a/plat/mediatek/mt8195/platform.mk
+++ b/plat/mediatek/mt8195/platform.mk
@@ -10,6 +10,7 @@
 PLAT_INCLUDES := -I${MTK_PLAT}/common/                            \
                  -I${MTK_PLAT}/common/drivers/gic600/             \
                  -I${MTK_PLAT}/common/drivers/gpio/               \
+                 -I${MTK_PLAT}/common/drivers/rtc/                \
                  -I${MTK_PLAT}/common/drivers/timer/              \
                  -I${MTK_PLAT_SOC}/drivers/gpio/                  \
                  -I${MTK_PLAT_SOC}/drivers/mcdi/                  \
@@ -39,6 +40,8 @@
                 ${MTK_PLAT}/common/drivers/gic600/mt_gic_v3.c         \
                 ${MTK_PLAT}/common/drivers/gpio/mtgpio_common.c       \
                 ${MTK_PLAT}/common/drivers/pmic_wrap/pmic_wrap_init_v2.c \
+                ${MTK_PLAT}/common/drivers/rtc/rtc_common.c           \
+                ${MTK_PLAT}/common/drivers/rtc/rtc_mt6359p.c          \
                 ${MTK_PLAT}/common/drivers/timer/mt_timer.c           \
                 ${MTK_PLAT}/common/mtk_cirq.c                         \
                 ${MTK_PLAT}/common/mtk_plat_common.c                  \