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/hikey_bl2_mem_params_desc.c b/plat/hisilicon/hikey/hikey_bl2_mem_params_desc.c
index 50ca015..7c025c3 100644
--- a/plat/hisilicon/hikey/hikey_bl2_mem_params_desc.c
+++ b/plat/hisilicon/hikey/hikey_bl2_mem_params_desc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -28,7 +28,7 @@
 		    VERSION_2, entry_point_info_t, SECURE | NON_EXECUTABLE),
 
 	    SET_STATIC_PARAM_HEAD(image_info, PARAM_IMAGE_BINARY,
-		    VERSION_2, image_info_t, 0),
+		    VERSION_2, image_info_t, IMAGE_ATTRIB_PLAT_SETUP),
 	    .image_info.image_base = SCP_BL2_BASE,
 	    .image_info.image_max_size = SCP_BL2_SIZE,