ppc4xx: Add initial AMCC Makalu 405EX support

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index 9ec7a5c..5ae588f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -306,6 +306,7 @@
 	katmai			PPC440SPe
 	kilauea			PPC405EX
 	lwmon5			PPC440EPx
+	makalu			PPC405EX
 	ocotea			PPC440GX
 	p3p440			PPC440GP
 	pcs440ep		PPC440EP