treewide: Fix gdsys mail addresses
The @gdsys.cc addresses are supposed to be used for mailing lists.
Switch all occurrences of @gdsys.de mail addresses to their @gdsys.cc
equivalent.
Also, Dirk's address was wrong in one place; fix that as well.
Signed-off-by: Mario Six <six@gdsys.cc>
diff --git a/board/gdsys/mpc8308/Makefile b/board/gdsys/mpc8308/Makefile
index 42702fb..f9671cf 100644
--- a/board/gdsys/mpc8308/Makefile
+++ b/board/gdsys/mpc8308/Makefile
@@ -1,6 +1,6 @@
#
# (C) Copyright 2014
-# Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
+# Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
#
# SPDX-License-Identifier: GPL-2.0+
#