FVP: Add BL2 hash calculation in BL1

This patch provides support for measured boot by adding calculation
of BL2 image hash in BL1 and writing these data in TB_FW_CONFIG DTB.

Change-Id: Ic074a7ed19b14956719c271c805b35d147b7cec1
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
diff --git a/Makefile b/Makefile
index 8049a18..a1702be 100644
--- a/Makefile
+++ b/Makefile
@@ -367,6 +367,10 @@
 DTC_CPPFLAGS		+=	-P -nostdinc -Iinclude -Ifdts -undef \
 				-x assembler-with-cpp $(DEFINES)
 
+ifeq ($(MEASURED_BOOT),1)
+DTC_CPPFLAGS		+=	-DMEASURED_BOOT -DBL2_HASH_SIZE=${TCG_DIGEST_SIZE}
+endif
+
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 # Common sources and include directories
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