refactor(sgi): rename "CSS_SGI"" macro prefixes to "NRD"

As of now, several internal macros utilize "CSS_SGI" as their prefix.
Given the change to neoverse_rd, and the subsequent migration out of the
css directory, the prefix "CSS_SGI" is no longer appropriate.
Therefore, update the macro prefixes to "NRD" for consistency and
clarity.

Signed-off-by: Rohit Mathew <Rohit.Mathew@arm.com>
Change-Id: I3d1a9dba3e83f6e107379fc5bcf8256cc93d8c3d
diff --git a/plat/arm/board/neoverse_rd/common/nrd_plat_v2.c b/plat/arm/board/neoverse_rd/common/nrd_plat_v2.c
index c07117e..b39c8f0 100644
--- a/plat/arm/board/neoverse_rd/common/nrd_plat_v2.c
+++ b/plat/arm/board/neoverse_rd/common/nrd_plat_v2.c
@@ -25,7 +25,7 @@
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	SGI_MAP_FLASH0_RO,
-	CSS_SGI_MAP_DEVICE,
+	NRD_MAP_DEVICE,
 	SOC_PLATFORM_PERIPH_MAP_DEVICE,
 	SOC_SYSTEM_PERIPH_MAP_DEVICE,
 	{0}
@@ -39,7 +39,7 @@
 #ifdef PLAT_ARM_MEM_PROT_ADDR
 	ARM_V2M_MAP_MEM_PROTECT,
 #endif
-	CSS_SGI_MAP_DEVICE,
+	NRD_MAP_DEVICE,
 	SOC_MEMCNTRL_MAP_DEVICE,
 	SOC_PLATFORM_PERIPH_MAP_DEVICE,
 	SOC_SYSTEM_PERIPH_MAP_DEVICE,
@@ -72,7 +72,7 @@
 #ifdef PLAT_ARM_MEM_PROT_ADDR
 	ARM_V2M_MAP_MEM_PROTECT,
 #endif
-	CSS_SGI_MAP_DEVICE,
+	NRD_MAP_DEVICE,
 	SOC_PLATFORM_PERIPH_MAP_DEVICE,
 	SOC_SYSTEM_PERIPH_MAP_DEVICE,
 #if SPM_MM || (SPMC_AT_EL3 && SPMC_AT_EL3_SEL0_SP)
@@ -90,7 +90,7 @@
 	ARM_SP_IMAGE_MMAP,
 	ARM_SP_IMAGE_NS_BUF_MMAP,
 #if ENABLE_FEAT_RAS && FFH_SUPPORT
-	CSS_SGI_SP_CPER_BUF_MMAP,
+	NRD_SP_CPER_BUF_MMAP,
 #endif
 	ARM_SP_IMAGE_RW_MMAP,
 	ARM_SPM_BUF_EL0_MMAP,