ARM: dts: turris-omnia: Add global LED brightness change interrupt

When global LED brightness is changed by pressing the front button on
Turris Omnia, the MCU can produce an interrupt to the CPU. Add the
description of this interrupt to the LED controller node.

Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Author: elkablo

arch/arm/boot/dts/marvell/armada-385-turris-omnia.dts

@@ -251,6 +251,7 @@
 			led-controller@2b {
 				compatible = "cznic,turris-omnia-leds";
 				reg = <0x2b>;
+				interrupts-extended = <&mcu 11 IRQ_TYPE_NONE>;
 				#address-cells = <1>;
 				#size-cells = <0>;
 				status = "okay";