Initialize platform for MediaTek MT8195

- Add basic platform setup
- Add MT8195 documentation at docs/plat/
- Add generic CPU helper functions
- Add basic register address

Change-Id: I7978e2f32e58900e5cf93f741ee8eaf8b8e3b842
diff --git a/plat/mediatek/mt8195/include/plat_private.h b/plat/mediatek/mt8195/include/plat_private.h
new file mode 100644
index 0000000..7ef2b85
--- /dev/null
+++ b/plat/mediatek/mt8195/include/plat_private.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_PRIVATE_H
+#define PLAT_PRIVATE_H
+
+/*******************************************************************************
+ * Function and variable prototypes
+ ******************************************************************************/
+void plat_configure_mmu_el3(uintptr_t total_base,
+			    uintptr_t total_size,
+			    uintptr_t ro_start,
+			    uintptr_t ro_limit);
+
+#endif /* PLAT_PRIVATE_H */