build(n1sdp): add ARM_ARCH_MAJOR.ARM_ARCH_MINOR

n1sdp based out of Arm Neoverse N1 Core uses Arm®v8.2‑A extensions
so set ARM_ARCH_MAJOR.ARM_ARCH_MINOR for n1sdp platform to 8.2

Change-Id: Ib70c6be5e12817961430870d50fb1b0efca32df2
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/plat/arm/board/n1sdp/platform.mk b/plat/arm/board/n1sdp/platform.mk
index bd62614..f937ee7 100644
--- a/plat/arm/board/n1sdp/platform.mk
+++ b/plat/arm/board/n1sdp/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018-2022, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2023, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -14,6 +14,10 @@
 
 N1SDP_CPU_SOURCES	:=	lib/cpus/aarch64/neoverse_n1.S
 
+# Neoverse N1 cores support Armv8.2 extensions
+ARM_ARCH_MAJOR := 8
+ARM_ARCH_MINOR := 2
+
 # GIC-600 configuration
 GICV3_SUPPORT_GIC600		:=	1
 GICV3_IMPL_GIC600_MULTICHIP	:=	1