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_io_storage.c b/plat/hisilicon/hikey/hikey_io_storage.c
index 57c66d5..90c2f81 100644
--- a/plat/hisilicon/hikey/hikey_io_storage.c
+++ b/plat/hisilicon/hikey/hikey_io_storage.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -65,10 +65,6 @@
 	.block_size	= EMMC_BLOCK_SIZE,
 };
 
-static const io_uuid_spec_t bl2_uuid_spec = {
-	.uuid = UUID_TRUSTED_BOOT_FIRMWARE_BL2,
-};
-
 static const io_uuid_spec_t bl31_uuid_spec = {
 	.uuid = UUID_EL3_RUNTIME_FIRMWARE_BL31,
 };
@@ -99,11 +95,6 @@
 		(uintptr_t)&emmc_fip_spec,
 		check_emmc
 	},
-	[BL2_IMAGE_ID] = {
-		&fip_dev_handle,
-		(uintptr_t)&bl2_uuid_spec,
-		check_fip
-	},
 	[SCP_BL2_IMAGE_ID] = {
 		&fip_dev_handle,
 		(uintptr_t)&scp_bl2_uuid_spec,