mailmap: Update Jagan Teki's name and email address

Used quite different name's and e-mail address, all of
them mapped to standard name and e-mail address.

Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>

.mailmap

@@ -13,7 +13,11 @@ Andreas Bießmann <andreas.devel@googlemail.com>
 Aneesh V <aneesh@ti.com>
 Dirk Behme <dirk.behme@googlemail.com>
 Fabio Estevam <fabio.estevam@freescale.com>
-Jagannadha Sutradharudu Teki <402jagan@gmail.com>
+Jagan Teki <402jagan@gmail.com>
+Jagan Teki <jaganna@gmail.com>
+Jagan Teki <jaganna@xilinx.com>
+Jagan Teki <jagannadh.teki@gmail.com>
+Jagan Teki <jagannadha.sutradharudu-teki@xilinx.com>
 Markus Klotzbuecher <mk@denx.de>
 Prabhakar Kushwaha <prabhakar@freescale.com>
 Rajeshwari Shinde <rajeshwari.s@samsung.com>