Enable TRUSTED_BOARD_BOOT support for LOAD_IMAGE_V2=1

This patch enables TRUSTED_BOARD_BOOT (Authentication and FWU)
support, for AArch64, when LOAD_IMAGE_V2 is enabled.

This patch also enables LOAD_IMAGE_V2 for ARM platforms.

Change-Id: I294a2eebce7a30b6784c80c9d4ac7752808ee3ad
Signed-off-by: Yatharth Kochar <yatharth.kochar@arm.com>
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 626b443..d0940b8 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -97,6 +97,8 @@
 # mapping the former as executable and the latter as execute-never.
 SEPARATE_CODE_AND_RODATA	:=	1
 
+# Enable new version of image loading on ARM platforms
+LOAD_IMAGE_V2			:=	1
 
 PLAT_INCLUDES		+=	-Iinclude/common/tbbr				\
 				-Iinclude/plat/arm/common