update David Miller's old email address

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/arch/mips/fw/arc/tree.c b/arch/mips/fw/arc/tree.c
index d68e5a5..924a37d 100644
--- a/arch/mips/fw/arc/tree.c
+++ b/arch/mips/fw/arc/tree.c
@@ -5,7 +5,7 @@
  *
  * PROM component device tree code.
  *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
  * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
  * Copyright (C) 1999 Silicon Graphics, Inc.
  */