Merge tag 'pull-tcg-20260612' of https://gitlab.com/rth7680/qemu into staging

tcg: Silence ubsan error on tcg_splitwx_diff causing overflow

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* tag 'pull-tcg-20260612' of https://gitlab.com/rth7680/qemu:
  tcg: Silence ubsan error on tcg_splitwx_diff causing overflow

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>