sections: fix section conflicts in arch/powerpc

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/powerpc/platforms/40x/ppc40x_simple.c

@@ -50,7 +50,7 @@ machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
  * Again, if your board needs to do things differently then create a
  * board.c file for it rather than adding it to this list.
  */
-static const char *board[] __initdata = {
+static const char * const board[] __initconst = {
 	"amcc,acadia",
 	"amcc,haleakala",
 	"amcc,kilauea",