Add support for Korat PPC440EPx board

These patches add support for the PPC440EPx-based "Korat" board to
U-Boot.  They are based primarily on support for the Sequoia board.

Signed-off-by: Larry Johnson <lrj@acm.org>
diff --git a/MAKEALL b/MAKEALL
index fb53a91..97e3891 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -191,6 +191,7 @@
 	katmai		\
 	kilauea		\
 	kilauea_nand	\
+	korat		\
 	luan		\
 	lwmon5		\
 	makalu		\