powerpc/bootwrapper: Custom build options for XPedite52xx targets

Some XPedite52xx boards have a legacy boot loader requiring some special
care in the boot wrapper.  The use of cuboot-85xx is needed to fix
up embedded device trees, and a custom link address is specified to
accommodate the boot loader and larger kernel image sizes used on X-ES
MPC85xx platforms.
Signed-off-by: NNate Case <ncase@xes-inc.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/wrapper

@@ -225,6 +225,10 @@ asp834x-redboot)
     platformo="$object/fixed-head.o $object/redboot-83xx.o"
     binary=y
     ;;
+xpedite52*)
+    link_address='0x1400000'
+    platformo=$object/cuboot-85xx.o
+    ;;
 esac
 
 vmz="$tmpdir/`basename \"$kernel\"`.$ext"