dt-bindings: qcom: Document samsung,j3ltetw

Document samsung,j3ltetw bindings used in its device tree.

Signed-off-by: Lin, Meng-Bo <linmengbo06890@proton.me>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240804065854.42437-2-linmengbo06890@proton.me


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