dt-bindings: interrupt-controller: Add header file for Amlogic Meson-G12A SoCs

Add a new dt-binding header that details the interrupt number of the GPIO.

Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230724060108.1403662-2-huqiang.qin@amlogic.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>