Fix multi_isa build for arch=arm64-v8a

* Partially resolves MLCE-1191

Change-Id: I083c9c81dbb391dfba49518843fec2e8febae726
Signed-off-by: Pablo Marquez Tello <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/11043
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/SConscript b/SConscript
index 519555a..e8f8b87 100644
--- a/SConscript
+++ b/SConscript
@@ -93,7 +93,7 @@
                            'ARM_COMPUTE_ENABLE_I8MM', 'ARM_COMPUTE_ENABLE_SVEF32MM'])
 
     # Build all the common files for the base architecture
-    if env['arch'] == 'armv8a':
+    if env['arch'] == 'armv8a' or env['arch'] == 'arm64-v8a':
         lib_static_objs += build_obj_list(filedefs["armv8-a"], misa_lib_files, static=True)
         lib_shared_objs += build_obj_list(filedefs["armv8-a"], misa_lib_files, static=False)
     else: