feat(board/rdn2): enable base element RAM RAS support on RD-N2 platform

To enable firmware first support for base element RAMs on RD-N2 platform
this patch adds following support
- Includes SDEI header to enable SDEI feature on RD-N2 platform.
- Add TZC configuration for CPER memory region for RD-N2 platform
  variants. This region is marked for non-secure access as OSPM and
  firmware need to access this region.
- Defines all base element RAM errors for RD-N2 platform variants.
- Defines a platform RAS event map and respective RAS config data
  structure.

Signed-off-by: Omkar Anand Kulkarni <omkar.kulkarni@arm.com>
Change-Id: Ideaed598f4924f3b9836d4d7e9ef76b9b7580b48
diff --git a/plat/arm/board/rdn2/rdn2_security.c b/plat/arm/board/rdn2/rdn2_security.c
index dff6a19..b836a7f 100644
--- a/plat/arm/board/rdn2/rdn2_security.c
+++ b/plat/arm/board/rdn2/rdn2_security.c
@@ -8,8 +8,16 @@
 #include <plat/arm/common/plat_arm.h>
 #include <platform_def.h>
 
+#define RDN2_TZC_CPER_REGION					\
+	{CSS_SGI_SP_CPER_BUF_BASE, (CSS_SGI_SP_CPER_BUF_BASE +	\
+	CSS_SGI_SP_CPER_BUF_SIZE) - 1, TZC_REGION_S_NONE,	\
+	PLAT_ARM_TZC_NS_DEV_ACCESS}
+
 static const arm_tzc_regions_info_t tzc_regions[] = {
 	ARM_TZC_REGIONS_DEF,
+#if RAS_FFH_SUPPORT
+	RDN2_TZC_CPER_REGION,
+#endif
 	{}
 };