TBB: add TBBR Chain of Trust

This patch adds a CoT based on the Trusted Board Boot Requirements
document*. The CoT consists of an array of authentication image
descriptors indexed by the image identifiers.

A new header file with TBBR image identifiers has been added.
Platforms that use the TBBR (i.e. ARM platforms) may reuse these
definitions as part of their platform porting.

PLATFORM PORT - IMPORTANT:

Default image IDs have been removed from the platform common
definitions file (common_def.h). As a consequence, platforms that
used those common definitons must now either include the IDs
provided by the TBBR header file or define their own IDs.

*The NVCounter authentication method has not been implemented yet.

Change-Id: I7c4d591863ef53bb0cd4ce6c52a60b06fa0102d5
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 3b7c057..5b26b6d 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -46,7 +46,8 @@
 # Process flags
 $(eval $(call add_define,ARM_TSP_RAM_LOCATION_ID))
 
-PLAT_INCLUDES		+=	-Iinclude/plat/arm/common			\
+PLAT_INCLUDES		+=	-Iinclude/common/tbbr				\
+				-Iinclude/plat/arm/common			\
 				-Iinclude/plat/arm/common/aarch64