Remove references to old project name from common files

The project has been renamed from "Arm Trusted Firmware (ATF)" to
"Trusted Firmware-A (TF-A)" long ago. A few references to the old
project name that still remained in various places have now been
removed.

This change doesn't affect any platform files. Any "ATF" references
inside platform files, still remain.

Change-Id: Id97895faa5b1845e851d4d50f5750de7a55bf99e
Signed-off-by: John Tsichritzis <john.tsichritzis@arm.com>
diff --git a/.editorconfig b/.editorconfig
index 0e7a5c3..928c307 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,10 +1,10 @@
 #
-# Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2017-2019, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-# ARM Trusted Firmware Coding style spec for editors.
+# Trusted Firmware-A Coding style spec for editors.
 
 # References:
 # [EC]          http://editorconfig.org/