fix(sgi): apply workarounds for N2 CPU erratum

For RD-N2 and variant platforms, enable workarounds available for the
N2 CPU erratum.

Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
Change-Id: Ib0240f56813a913309e5a6a1902e2990979e9617
diff --git a/plat/arm/board/rdn2/platform.mk b/plat/arm/board/rdn2/platform.mk
index beaddef..28ec5dc 100644
--- a/plat/arm/board/rdn2/platform.mk
+++ b/plat/arm/board/rdn2/platform.mk
@@ -105,3 +105,25 @@
 
 # Enable the flag since RD-N2 has a system level cache
 NEOVERSE_Nx_EXTERNAL_LLC		:=	1
+
+# Enable N2 CPU errata workarounds
+ERRATA_N2_2002655	:=	1
+ERRATA_N2_2009478	:=	1
+ERRATA_N2_2067956	:=	1
+ERRATA_N2_2025414	:=	1
+ERRATA_N2_2189731	:=	1
+ERRATA_N2_2138956	:=	1
+ERRATA_N2_2138953	:=	1
+ERRATA_N2_2242415	:=	1
+ERRATA_N2_2138958	:=	1
+ERRATA_N2_2242400	:=	1
+ERRATA_N2_2280757	:=	1
+ERRATA_N2_2326639	:=	1
+ERRATA_N2_2340933	:=	1
+ERRATA_N2_2346952	:=	1
+ERRATA_N2_2376738	:=	1
+ERRATA_N2_2388450	:=	1
+ERRATA_N2_2743014	:=	1
+ERRATA_N2_2743089	:=	1
+ERRATA_N2_2728475	:=	1
+ERRATA_N2_2779511	:=	1