8xx, kup4k/kup4x: configuration changes, code cleanup

- nfs-options removed
- hda->sda changed
- mtd parts added
- loadaddress changed
- cmd-line length increased
- lcd stuff removed
- code cleanup (use I/O accessors etc.)

Signed-off-by: Klaus Heydeck <heydeck@kieback-peter.de>
diff --git a/boards.cfg b/boards.cfg
index a70f541..69c6897 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -160,7 +160,7 @@
 kmsupx4		powerpc	mpc8xx		km8xx		keymile
 mgsuvd		powerpc	mpc8xx		km8xx		keymile
 KUP4K		powerpc	mpc8xx		kup4k		kup
-KUP4X		powerpc	mpc8xx		kup4k		kup
+KUP4X		powerpc	mpc8xx		kup4x		kup
 ELPT860		powerpc	mpc8xx		elpt860		LEOX
 CCM		powerpc	mpc8xx		-		siemens
 IAD210		powerpc	mpc8xx		-		siemens