[PATCH] fix amd64 boot breakage

This fixes a bug that prevent my amd64 box from booting;
numa_default_policy was __init however it's called like this in
init/main.c:

        free_initmem();
        unlock_kernel();
        system_state = SYSTEM_RUNNING;
        numa_default_policy();


eg after free_initmem(). This resulted in it being reused/freed and that
gives a nasty oops.

mm/mempolicy.c

@@ -1022,7 +1022,7 @@ void __init numa_policy_init(void)
 
 /* Reset policy of current process to default.
  * Assumes fs == KERNEL_DS */
-void __init numa_default_policy(void)
+void numa_default_policy(void)
 {
 	sys_set_mempolicy(MPOL_DEFAULT, NULL, 0);
 }