dt-bindings: interrupt-controller: Add support for Amlogic-C3 SoCs

Update dt-binding document for GPIO interrupt controller of Amlogic-C3 SoCs

Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230628091533.3884385-2-huqiang.qin@amlogic.com