dt-bindings: remoteproc: qcom: adsp: add qcom,sdm845-slpi-pas compatible

SLPI DSP remoteproc on DSP is defined by the 'qcom,sdm845-slpi-pas'
compatible in the qcom_q6v5_pas driver. Add this compatible to the
devicetree bindings.

Signed-off-by: Dylan Van Assche <me@dylanvanassche.be>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230330164633.117335-2-me@dylanvanassche.be


Signed-off-by: Bjorn Andersson <andersson@kernel.org>