dt-bindings: soc: qcom,aoss-qmp: Document the SDX75 AOSS channel

Document the Always-On Subsystem side channel on the SDX75 Platform.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20240426055326.3141727-4-quic_rohiagar@quicinc.com


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