arm: add support for kirkwood based mgcoge2un board

This board is similar to keymile suen3.

Signed-off-by: Clive Stubbings <clive.stubbings@xentech.co.uk>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 67daee6..5433258 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -428,6 +428,7 @@
 	jupiter		MPC5200
 	kmeter1		MPC8360
 	mgcoge		MPC8247
+	mgcoge2un	ARM926EJS (Kirkwood SoC)
 	mucmc52		MPC5200
 	muas3001	MPC8270
 	municse		MPC5200