softmmu/memory: Clean up local variable shadowing

Fix:

  softmmu/memory.c: In function ‘mtree_print_mr’:
  softmmu/memory.c:3236:27: warning: declaration of ‘ml’ shadows a previous local [-Wshadow=compatible-local]
   3236 |         MemoryRegionList *ml;
        |                           ^~
  softmmu/memory.c:3213:32: note: shadowed declaration is here
   3213 |     MemoryRegionList *new_ml, *ml, *next_ml;
        |                                ^~

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-22-philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/softmmu/memory.c b/softmmu/memory.c
index c0383a1..234bd7b 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -3245,7 +3245,6 @@
     }
 
     if (mr->alias) {
-        MemoryRegionList *ml;
         bool found = false;
 
         /* check if the alias is already in the queue */