Merge tag 'pull-tpm-2023-01-17-1' of https://github.com/stefanberger/qemu-tpm into staging

Merge tpm 2023/01/17 v1

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* tag 'pull-tpm-2023-01-17-1' of https://github.com/stefanberger/qemu-tpm:
  tests/qtest/tpm-emu: Avoid hangs using abort handlers closing channels
  tests/qtest: Poll on waitpid() for a while before sending SIGKILL

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>