chore: update to use Arm word across TF-A

Align entire TF-A to use Arm in copyright header.

Change-Id: Ief9992169efdab61d0da6bd8c5180de7a4bc2244
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/lib/romlib/gen_combined_bl1_romlib.sh b/lib/romlib/gen_combined_bl1_romlib.sh
index 1e3f73a..3941467 100755
--- a/lib/romlib/gen_combined_bl1_romlib.sh
+++ b/lib/romlib/gen_combined_bl1_romlib.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2018, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause