Include 2020 year in Arm Copyright

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I4d8b5c48c98658d014b6b220a1a37c389cd79778
diff --git a/model/css-sgi575-ports.awk b/model/css-sgi575-ports.awk
index f34bff1..4a59a46 100644
--- a/model/css-sgi575-ports.awk
+++ b/model/css-sgi575-ports.awk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019, Arm Limited. All rights reserved.
+# Copyright (c) 2019-2020 Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #