dt-bindings: arm: add samsung,starqltechn board based on sdm845 chip

Add samsung,starqltechn board (Samsung Galaxy S9) binding.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221012185411.1282838-2-dsankouski@gmail.com