memory: cpu_physical_memory_set_dirty_range() always dirty all flags

So remove the flag argument and do it directly.  After this change,
there is nothing else using cpu_physical_memory_set_dirty_flags() so
remove it.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
diff --git a/memory.c b/memory.c
index e497f99..fb52e1c 100644
--- a/memory.c
+++ b/memory.c
@@ -1182,7 +1182,7 @@
                              hwaddr size)
 {
     assert(mr->terminates);
-    cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1);
+    cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size);
 }
 
 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,