dt-bindings: leds: cznic,turris-omnia-leds: Allow interrupts property

Extend the cznic,turris-omnia-leds binding with interrupts property,
specifying the global LED brightness changed by button press interrupt.

Signed-off-by: Marek Behún <kabel@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241111100355.6978-6-kabel@kernel.org


Signed-off-by: Lee Jones <lee@kernel.org>