ARM: Add Calxeda Highbank platform

Add basic support for Calxeda Highbank platform. Only minimal support with
serial and SATA are included.

Signed-off-by: Jason Hobbs <jason.hobbs@calxeda.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index f2fdb6e..576fea8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -219,6 +219,10 @@
 	IPHASE4539	MPC8260
 	SCM		MPC8260
 
+Rob Herring <rob.herring@calxeda.com>
+
+	highbank	highbank
+
 Klaus Heydeck <heydeck@kieback-peter.de>
 
 	KUP4K		MPC855