refactor(neoverse-rd): header files for second generation platforms

Presently, platforms such as RD-N2, RD-N2-Cfg1, RD-N2-Cfg2 and RD-V2
utilize nrd_soc_platform_def_v2.h and nrd_soc_css_def_v2.h for all css
and soc-related defines. So move these two header files into a new
directory named 'nrd2'. This new directory will serve as the container
of header files that are specific to the former stated platforms.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I51ba0944dea91ae81e1840947d2e9af9b28d561d
diff --git a/plat/arm/board/neoverse_rd/common/include/nrd_soc_css_def_v2.h b/plat/arm/board/neoverse_rd/common/include/nrd2/nrd_soc_css_def_v2.h
similarity index 100%
rename from plat/arm/board/neoverse_rd/common/include/nrd_soc_css_def_v2.h
rename to plat/arm/board/neoverse_rd/common/include/nrd2/nrd_soc_css_def_v2.h
diff --git a/plat/arm/board/neoverse_rd/common/include/nrd_soc_platform_def_v2.h b/plat/arm/board/neoverse_rd/common/include/nrd2/nrd_soc_platform_def_v2.h
similarity index 100%
rename from plat/arm/board/neoverse_rd/common/include/nrd_soc_platform_def_v2.h
rename to plat/arm/board/neoverse_rd/common/include/nrd2/nrd_soc_platform_def_v2.h
diff --git a/plat/arm/board/neoverse_rd/platform/rdn2/platform.mk b/plat/arm/board/neoverse_rd/platform/rdn2/platform.mk
index 12e7db4..e5d4def 100644
--- a/plat/arm/board/neoverse_rd/platform/rdn2/platform.mk
+++ b/plat/arm/board/neoverse_rd/platform/rdn2/platform.mk
@@ -32,7 +32,8 @@
 
 RDN2_BASE		=	plat/arm/board/neoverse_rd/platform/rdn2
 
-PLAT_INCLUDES		+=	-I${RDN2_BASE}/include/
+PLAT_INCLUDES		+=	-I${NRD_COMMON_BASE}/include/nrd2/	\
+				-I${RDN2_BASE}/include/
 
 NRD_CPU_SOURCES		:=	lib/cpus/aarch64/neoverse_n2.S \
 				lib/cpus/aarch64/neoverse_v2.S