dt-bindings: watchdog: brcm,kona-wdt: convert txt file to yaml

Converted txt file to yaml. No additional changes.

Signed-off-by: Nikita Bondarenko <n2h9z4@gmail.com>
Link: https://lore.kernel.org/r/20230418170341.28805-1-n2h9z4@gmail.com


Signed-off-by: Rob Herring <robh@kernel.org>