Target specific usermode cleanup

Disable various target specific code that is only relevant to system emulation.

Signed-off-by: Paul Brook <paul@codesourcery.com>
diff --git a/target-microblaze/op_helper.c b/target-microblaze/op_helper.c
index 8a9cea2..be0c829 100644
--- a/target-microblaze/op_helper.c
+++ b/target-microblaze/op_helper.c
@@ -245,7 +245,6 @@
 {
     mmu_write(env, rn, v);
 }
-#endif
 
 void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
                           int is_asi, int size)
@@ -282,3 +281,4 @@
     }
     env = saved_env;
 }
+#endif