[Feature] add GA346 baseline version

Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/soc/mediatek/mtk-scpsys.h b/src/kernel/linux/v4.19/drivers/soc/mediatek/mtk-scpsys.h
new file mode 100644
index 0000000..5b3dfe7
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/soc/mediatek/mtk-scpsys.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ */
+
+#ifndef __MTK_SCPSYS_H__
+#define __MTK_SCPSYS_H__
+
+struct scp_event_data {
+	int event_type;
+	int domain_id;
+	struct generic_pm_domain *genpd;
+};
+
+enum scp_event_type {
+	MTK_SCPSYS_PSTATE,
+};
+
+int register_scpsys_notifier(struct notifier_block *nb);
+int unregister_scpsys_notifier(struct notifier_block *nb);
+
+#endif /* __MTK_SCPSYS_H__ */
+