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/include/plat/arm/common/arm_dyn_cfg_helpers.h b/include/plat/arm/common/arm_dyn_cfg_helpers.h
index 2dc94ab..34bf07c 100644
--- a/include/plat/arm/common/arm_dyn_cfg_helpers.h
+++ b/include/plat/arm/common/arm_dyn_cfg_helpers.h
@@ -14,4 +14,8 @@
 int arm_set_dtb_mbedtls_heap_info(void *dtb, void *heap_addr,
 	size_t heap_size);
 
+#if MEASURED_BOOT
+int arm_set_bl2_hash_info(void *dtb, void *data);
+#endif
+
 #endif /* ARM_DYN_CFG_HELPERS_H */