mpc83xx: update the CREDITS and MAINTAINERS

update the CREDITS and MAINTAINERS.

Signed-off-by: Dave Liu <daveliu@freescale.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 1e551ed..43b3b79 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -227,6 +227,7 @@
 
 Dave Liu <daveliu@freescale.com>
 
+	MPC832XEMDS		MPC832x
 	MPC8360EMDS		MPC8360
 	MPC837XEMDS		MPC837x