hikey960: support BL2

BL2 loads MCU firmware & BL31 on hikey960 platform. The MCU firmware
is used to implement low power feature.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
diff --git a/plat/hisilicon/hikey960/platform.mk b/plat/hisilicon/hikey960/platform.mk
index b04c5ef..bb16dfe 100644
--- a/plat/hisilicon/hikey960/platform.mk
+++ b/plat/hisilicon/hikey960/platform.mk
@@ -10,6 +10,7 @@
 
 # Process flags
 $(eval $(call add_define,CRASH_CONSOLE_BASE))
+$(eval $(call FIP_ADD_IMG,SCP_BL2,--scp-fw))
 
 ENABLE_PLAT_COMPAT	:=	0
 
@@ -41,3 +42,11 @@
 				plat/hisilicon/hikey960/hikey960_bl1_setup.c 	\
 				plat/hisilicon/hikey960/hikey960_io_storage.c \
 				${HIKEY960_GIC_SOURCES}
+
+BL2_SOURCES		+=	drivers/io/io_block.c			\
+				drivers/io/io_fip.c			\
+				drivers/io/io_storage.c			\
+				drivers/ufs/ufs.c			\
+				plat/hisilicon/hikey960/hikey960_bl2_setup.c \
+				plat/hisilicon/hikey960/hikey960_io_storage.c \
+				plat/hisilicon/hikey960/hikey960_mcu_load.c