dt-bindings: arm: samsung: document jackpotlte board binding

Add binding for the jackpotlte board (Samsung Galaxy A8 (2018)).

Signed-off-by: David Virag <virag.david003@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20211206153124.427102-4-virag.david003@gmail.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>