dt-bindings: arm: qcom: Document QCS8550 SoC and the AIM300 AIoT board

dt-bindings: arm: qcom: Document QCS8550 SoC and the AIM300 AIoT board

Document QCS8550 SoC and the AIM300 AIoT board bindings.
QCS8550 is derived from SM8550. The difference between SM8550 and
QCS8550 is QCS8550 doesn't have modem RF system. QCS8550 is mainly used
in IoT scenarios.
AIM300 Series is a highly optimized family of modules designed to
support AIoT applications. It integrates QCS8550 SoC, UFS and PMIC chip
etc.
AIM stands for Artificial Intelligence Module. AIoT stands for AI IoT.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Tengfei Fan <quic_tengfan@quicinc.com>
Link: https://lore.kernel.org/r/20240618072202.2516025-2-quic_tengfan@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>