mpc83xx: Add support for MergerBox board

Includes board config file, documentation, maintainer and boards.cfg
entries, and board specific files in vendor dir.

Signed-off-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 11abacf..ee4e8d5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -451,6 +451,7 @@
 
 Andre Schwarz <andre.schwarz@matrix-vision.de>
 
+	mergerbox	MPC8377
 	mvbc_p		MPC5200
 	mvblm7		MPC8343
 	mvsmr		MPC5200