refactor(sgi): replace references to "SGI"/"sgi" for neoverse_rd

Currently, there are several reference to "SGI" or "sgi" in comments or
as macro prefix within the neoverse_rd directory. As part of the
migration to neoverse_rd, rename all occurences of "SGI/sgi" to
"Neoverse-RD" or the "NRD" prefix accordingly. All references in
comments are rephrased as "Neoverse RD platforms". References in code
are renamed as "NRD"/"nrd" accordingly.

Signed-off-by: Rohit Mathew <Rohit.Mathew@arm.com>
Change-Id: Iec195427ff2bee565cb4a325a1a22892be95ae16
diff --git a/plat/arm/board/neoverse_rd/platform/rdv1mc/rdv1mc_security.c b/plat/arm/board/neoverse_rd/platform/rdv1mc/rdv1mc_security.c
index d437def..7fca31a 100644
--- a/plat/arm/board/neoverse_rd/platform/rdv1mc/rdv1mc_security.c
+++ b/plat/arm/board/neoverse_rd/platform/rdv1mc/rdv1mc_security.c
@@ -18,20 +18,20 @@
 static const arm_tzc_regions_info_t tzc_regions_mc[][NRD_CHIP_COUNT - 1] = {
 	{
 		/* TZC memory regions for second chip */
-		SGI_PLAT_TZC_NS_REMOTE_REGIONS_DEF(1),
+		NRD_PLAT_TZC_NS_REMOTE_REGIONS_DEF(1),
 		{}
 	},
 #if NRD_CHIP_COUNT > 2
 	{
 		/* TZC memory regions for third chip */
-		SGI_PLAT_TZC_NS_REMOTE_REGIONS_DEF(2),
+		NRD_PLAT_TZC_NS_REMOTE_REGIONS_DEF(2),
 		{}
 	},
 #endif
 #if NRD_CHIP_COUNT > 3
 	{
 		/* TZC memory regions for fourth chip */
-		SGI_PLAT_TZC_NS_REMOTE_REGIONS_DEF(3),
+		NRD_PLAT_TZC_NS_REMOTE_REGIONS_DEF(3),
 		{}
 	},
 #endif