refactor(mt8188): move platform_def.h to mt8188/include

It is more suitable to place platform_def.h in mt8188/include.

Change-Id: I35720690ff4f2ca99c9430edb8bbe17edf9aefb9
diff --git a/plat/mediatek/include/mt8188/platform_def.h b/plat/mediatek/mt8188/include/platform_def.h
similarity index 100%
rename from plat/mediatek/include/mt8188/platform_def.h
rename to plat/mediatek/mt8188/include/platform_def.h
diff --git a/plat/mediatek/mt8188/platform.mk b/plat/mediatek/mt8188/platform.mk
index 765589b..99ba43f 100644
--- a/plat/mediatek/mt8188/platform.mk
+++ b/plat/mediatek/mt8188/platform.mk
@@ -14,7 +14,6 @@
 
 PLAT_INCLUDES := -I${MTK_PLAT}/common \
 		 -I${MTK_PLAT}/include \
-		 -I${MTK_PLAT}/include/${MTK_SOC} \
 		 -I${MTK_PLAT}/include/${ARCH_VERSION} \
 		 -I${MTK_PLAT} \
 		 -I${MTK_PLAT_SOC}/include \