dt-bindings: qcom: geni-se: Allow dma-coherent

On SM8550, the QUP controller is coherent with the CPU.
Allow specifying that.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230830-topic-8550_dmac2-v1-2-49bb25239fb1@linaro.org


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