refactor(tc): add platform specific DT files

Currently, the DT binding uses the file 'tc.dts' as a central place for
all TC platforms. And the variables (for different platforms, or FVP vs
FPGA, etc.) are maintained in 'tc_vers.dtsi'.

This patch renames 'tc.dts' to 'tc-base.dtsi' and creates an individual
.dts file for every platform. The purpose is to use 'tc-base.dtsi' for
maintaining common DT binding and every platform's specific definitions
will be moved into its own .dts file. This is a preparation for
sequential refactoring.

It changes to include the header files in platform DTS files but not in
the 'tc-base.dtsi'. This can allow 'tc-base.dtsi' is general enough and
platform DTS files covers platform specific defintions.

Change-Id: I034fb3f8836bcea36e8ad8ae01de41127693b0c6
Signed-off-by: Leo Yan <leo.yan@arm.com>
diff --git a/plat/arm/board/tc/platform.mk b/plat/arm/board/tc/platform.mk
index 8756f31..4acac9e 100644
--- a/plat/arm/board/tc/platform.mk
+++ b/plat/arm/board/tc/platform.mk
@@ -162,7 +162,7 @@
 endif
 
 #Device tree
-TC_HW_CONFIG_DTS	:=	fdts/tc.dts
+TC_HW_CONFIG_DTS	:=	fdts/${PLAT}${TARGET_PLATFORM}.dts
 TC_HW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}.dtb
 FDT_SOURCES		+=	${TC_HW_CONFIG_DTS}
 $(eval TC_HW_CONFIG	:=	${BUILD_PLAT}/$(patsubst %.dts,%.dtb,$(TC_HW_CONFIG_DTS)))