platform/arm/sgi: add multi-chip mode parameter in HW_CONFIG dts

Include multi-chip-mode parameter in HW_CONFIG dts to let next stage of
boot firmware know about the multi-chip operation mode.

Change-Id: Ic7535c2280fd57180ad14aa0ae277cf0c4d1337b
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>

plat/arm/board/rde1edge/fdts/rde1edge_nt_fw_config.dts

 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,6 +17,7 @@
 	system-id {
 		platform-id = <0x0>;
 		config-id = <0x0>;
+		multi-chip-mode = <0x0>;
 	};
 
 };

plat/arm/board/rdn1edge/fdts/rdn1edge_nt_fw_config.dts

 /*
- * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,5 +17,6 @@
 	system-id {
 		platform-id = <0x0>;
 		config-id = <0x0>;
+		multi-chip-mode = <0x0>;
 	};
 };

plat/arm/board/sgi575/fdts/sgi575_nt_fw_config.dts

 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,5 +17,6 @@
 	system-id {
 		platform-id = <0x0>;
 		config-id = <0x0>;
+		multi-chip-mode = <0x0>;
 	};
 };

plat/arm/css/sgi/sgi_image_load.c

 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -62,6 +62,13 @@ static int plat_sgi_append_config_node(void)
 		return -1;
 	}
 
+	platcfg = plat_arm_sgi_get_multi_chip_mode();
+	err = fdt_setprop_u32(fdt, nodeoffset, "multi-chip-mode", platcfg);
+	if (err < 0) {
+		ERROR("Failed to set multi-chip-mode\n");
+		return -1;
+	}
+
 	flush_dcache_range((uintptr_t)fdt, mem_params->image_info.image_size);
 
 	return 0;