powerpc: Add a new zImage for maple using a different link address

The maple platform failed to load because it's firmware could not take a
link address of 0x4000000.  A new platform type with a link address of
0x400000 had to be created for the maple.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/boot/wrapper

@@ -149,6 +149,10 @@ pseries)
     platformo=$object/of.o
     link_address='0x4000000'
     ;;
+maple)
+    platformo=$object/of.o
+    link_address='0x400000'
+    ;;
 pmac|chrp)
     platformo=$object/of.o
     ;;
@@ -321,7 +325,7 @@ fi
 
 # post-processing needed for some platforms
 case "$platform" in
-pseries|chrp)
+pseries|chrp|maple)
     $objbin/addnote "$ofile"
     ;;
 coff)