plat/hisilicon: do not keep mmc_device_info in stack

Create a dedicated static struct mmc_device_info mmc_info mmc_info
instead of having this in stack.
A boot issue has been seen on some platform when applying patch [1].

 [1] 13f3c5166f1 ("mmc:prevent accessing to the released space in case of wrong usage")

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: If5db8857cccec2e677b16a38eb3eeb41628a264c
diff --git a/plat/hisilicon/hikey/hikey_bl1_setup.c b/plat/hisilicon/hikey/hikey_bl1_setup.c
index 86e4fd6..01c48ec 100644
--- a/plat/hisilicon/hikey/hikey_bl1_setup.c
+++ b/plat/hisilicon/hikey/hikey_bl1_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -27,6 +27,7 @@
 /* Data structure which holds the extents of the trusted RAM for BL1 */
 static meminfo_t bl1_tzram_layout;
 static console_t console;
+static struct mmc_device_info mmc_info;
 
 enum {
 	BOOT_NORMAL = 0,
@@ -78,7 +79,6 @@
 void bl1_platform_setup(void)
 {
 	dw_mmc_params_t params;
-	struct mmc_device_info info;
 
 	assert((HIKEY_BL1_MMC_DESC_BASE >= SRAM_BASE) &&
 	       ((SRAM_BASE + SRAM_SIZE) >=
@@ -99,8 +99,8 @@
 	params.clk_rate = 24 * 1000 * 1000;
 	params.bus_width = MMC_BUS_WIDTH_8;
 	params.flags = MMC_FLAG_CMD23;
-	info.mmc_dev_type = MMC_IS_EMMC;
-	dw_mmc_init(&params, &info);
+	mmc_info.mmc_dev_type = MMC_IS_EMMC;
+	dw_mmc_init(&params, &mmc_info);
 
 	hikey_io_setup();
 }