hikey: migrate to bl2_el3

Since non-TF ROM is used in HiKey platform (Hisilicon Hi6220 SoC),
replace BL1 by BL2_EL3 in normal boot mode.

When we recovery images in recovery mode, keep to use BL1.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
diff --git a/plat/hisilicon/hikey/platform.mk b/plat/hisilicon/hikey/platform.mk
index faaf88f..9add4b4 100644
--- a/plat/hisilicon/hikey/platform.mk
+++ b/plat/hisilicon/hikey/platform.mk
@@ -7,6 +7,9 @@
 # Enable version2 of image loading
 LOAD_IMAGE_V2	:=	1
 
+# Non-TF Boot ROM
+BL2_AT_EL3	:=	1
+
 # On Hikey, the TSP can execute from TZC secure area in DRAM (default)
 # or SRAM.
 HIKEY_TSP_RAM_LOCATION	:=	dram
@@ -70,13 +73,16 @@
 				plat/hisilicon/hikey/hikey_io_storage.c
 
 BL2_SOURCES		+=	common/desc_image_load.c		\
+				drivers/arm/pl061/pl061_gpio.c		\
 				drivers/arm/sp804/sp804_delay_timer.c	\
 				drivers/delay_timer/delay_timer.c	\
+				drivers/gpio/gpio.c			\
 				drivers/io/io_block.c			\
 				drivers/io/io_fip.c			\
 				drivers/io/io_storage.c			\
 				drivers/emmc/emmc.c			\
 				drivers/synopsys/emmc/dw_mmc.c		\
+				lib/cpus/aarch64/cortex_a53.S		\
 				plat/hisilicon/hikey/aarch64/hikey_helpers.S \
 				plat/hisilicon/hikey/hikey_bl2_mem_params_desc.c \
 				plat/hisilicon/hikey/hikey_bl2_setup.c	\