[POWERPC] prpmc2800: Clean up dts properties

Remove several unused (or software config only) properties.
Rename marvel node to "system-controller".  Also, rename the
"block-index" property to "cell-index" to conform to current
practice.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/mpsc.c b/arch/powerpc/boot/mpsc.c
index 802ea53..425ad88 100644
--- a/arch/powerpc/boot/mpsc.c
+++ b/arch/powerpc/boot/mpsc.c
@@ -141,7 +141,7 @@
 	if (mpscintr_base == NULL)
 		goto err_out;
 
-	n = getprop(devp, "block-index", &v, sizeof(v));
+	n = getprop(devp, "cell-index", &v, sizeof(v));
 	if (n != sizeof(v))
 		goto err_out;
 	reg_set = (int)v;