refactor(mediatek): partition MTK SiP SMC ID

Manage MTK SiP SMC ID with macros for 32/64 bit and
function declaration code generation.
Partition SMC ID with different exception level sources.

Change-Id: I8966cd94f0d825e7ebae08833d2bd9fceedfd45e
diff --git a/plat/mediatek/mt8183/platform.mk b/plat/mediatek/mt8183/platform.mk
index 1615cf9..653a0a6 100644
--- a/plat/mediatek/mt8183/platform.mk
+++ b/plat/mediatek/mt8183/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019, MediaTek Inc. All rights reserved.
+# Copyright (c) 2019-2022, MediaTek Inc. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -8,7 +8,8 @@
 MTK_PLAT_SOC  := ${MTK_PLAT}/${PLAT}
 
 PLAT_INCLUDES := -I${MTK_PLAT}/common/                            \
-                 -I${MTK_PLAT}/common/drivers/uart/                \
+                 -I${MTK_PLAT}/common/drivers/uart/               \
+                 -I${MTK_PLAT}/include/                           \
                  -I${MTK_PLAT_SOC}/drivers/                       \
                  -I${MTK_PLAT_SOC}/drivers/emi_mpu/               \
                  -I${MTK_PLAT_SOC}/drivers/devapc/                \