linux-user: Fix compilation failure

Fix compilation failures for linux-user targets following recent
migration related commits bd2fa51fcd and 43487c67.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1372362818-4740-1-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/exec.c b/exec.c
index 2e6fc00..f99041b 100644
--- a/exec.c
+++ b/exec.c
@@ -2629,7 +2629,6 @@
     return !(memory_region_is_ram(mr) ||
              memory_region_is_romd(mr));
 }
-#endif
 
 void qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
 {
@@ -2639,3 +2638,4 @@
         func(block->host, block->offset, block->length, opaque);
     }
 }
+#endif