Update Maintainer and Author's email address

I am not longer using my old email address
"ajay.bhargav@einfochips.com". For U-Boot development email address is
now updated to contact@8051projects.net

Signed-off-by: Ajay Bhargav <contact@8051projects.net>
diff --git a/board/Marvell/gplugd/Makefile b/board/Marvell/gplugd/Makefile
index b384578..8929da5 100644
--- a/board/Marvell/gplugd/Makefile
+++ b/board/Marvell/gplugd/Makefile
@@ -1,7 +1,7 @@
 #
 # (C) Copyright 2011
 # eInfochips Ltd. <www.einfochips.com>
-# Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
+# Written-by: Ajay Bhargav <contact@8051projects.net>
 #
 # Based on Aspenite:
 # (C) Copyright 2010