refactor(sgi): move from "sgi" to "neoverse_rd"

Currently, reference design platforms such as RD-N2, RD-N1-Edge,
RD-V1-MC, RD-V1 and SGI-575 utilize "css/sgi" as the common source
directory. The "sgi" prefix originated from the System Guidance for
Infrastructure (SGI) and was initially associated with the SGI-575
platform. However, subsequent platforms released were under the Neoverse
Reference Design product name.

To align with the Neoverse Reference Design nomenclature, rename the
common source directory from "css/sgi" to "css/neoverse_rd" and update
all file prefixes from "sgi" to "nrd."

Signed-off-by: Rohit Mathew <Rohit.Mathew@arm.com>
Change-Id: I3dcbb31b9ab202e82caf25218ba33c520dcea4e4
diff --git a/plat/arm/board/rdv1/include/platform_def.h b/plat/arm/board/rdv1/include/platform_def.h
index 620fa3e..7eca2bd 100644
--- a/plat/arm/board/rdv1/include/platform_def.h
+++ b/plat/arm/board/rdv1/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -9,7 +9,7 @@
 
 #include <lib/utils_def.h>
 
-#include <sgi_soc_platform_def.h>
+#include <nrd_soc_platform_def.h>
 
 #define PLAT_ARM_CLUSTER_COUNT		U(16)
 #define CSS_SGI_MAX_CPUS_PER_CLUSTER	U(1)
diff --git a/plat/arm/board/rdv1/platform.mk b/plat/arm/board/rdv1/platform.mk
index 0b059b5..9858e31 100644
--- a/plat/arm/board/rdv1/platform.mk
+++ b/plat/arm/board/rdv1/platform.mk
@@ -1,4 +1,4 @@
-# Copyright (c) 2020-2021, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2020-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -6,7 +6,7 @@
 # RD-V1 platform uses GIC-700 which is based on GICv4.1
 GIC_ENABLE_V4_EXTN	:=	1
 
-include plat/arm/css/sgi/sgi-common.mk
+include plat/arm/css/neoverse_rd/nrd-common.mk
 
 RDV1_BASE		=	plat/arm/board/rdv1
 
@@ -14,7 +14,7 @@
 
 SGI_CPU_SOURCES		:=	lib/cpus/aarch64/neoverse_v1.S
 
-PLAT_BL_COMMON_SOURCES	+=	${CSS_ENT_BASE}/sgi_plat.c
+PLAT_BL_COMMON_SOURCES	+=	${CSS_ENT_BASE}/nrd_plat.c
 
 BL1_SOURCES		+=	${SGI_CPU_SOURCES}			\
 				${RDV1_BASE}/rdv1_err.c
diff --git a/plat/arm/board/rdv1/rdv1_plat.c b/plat/arm/board/rdv1/rdv1_plat.c
index ab5251e..181d84a 100644
--- a/plat/arm/board/rdv1/rdv1_plat.c
+++ b/plat/arm/board/rdv1/rdv1_plat.c
@@ -1,11 +1,12 @@
 /*
- * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <plat/common/platform.h>
-#include <sgi_plat.h>
+
+#include <nrd_plat.h>
 
 unsigned int plat_arm_sgi_get_platform_id(void)
 {