memory: cpu_physical_memory_set_dirty_range() return void

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

memory.c

@@ -1182,7 +1182,7 @@ void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
                              hwaddr size)
 {
     assert(mr->terminates);
-    return cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1);
+    cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1);
 }
 
 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,