dt-bindings: arm: qcom: Add Particle Tachyon

The Particle Tachyon is a single board computer with 5G connectivity
with AI accelerator, based on the Qualcomm QCM6490 platform.

Document the top-level compatible for this board.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250915-tachyon-v2-2-4f8b02a17512@oss.qualcomm.com


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