dt-bindings: interrupt-controller: Add support for Amlogic-T7 SoCs

Update dt-binding document for GPIO interrupt controller
of Amlogic-T7 SoCs.

Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240222074640.1866284-2-huqiang.qin@amlogic.com