dt-bindings: interrupt-controller: aspeed,ast2700: Correct #interrupt-cells and interrupts count

Update the AST2700 interrupt controller binding to match the actual
hardware and the irq-aspeed-intc driver behavior.

 - Interrupts:

    First-level INTC banks request multiple interrupt lines to the root
    GIC, with a maximum of 10 per bank. Second-level INTC banks request
    only one interrupt line to their parent INTC-IC. Therefore, set the
    interrupts property to allow a minimum of 1 and a maximum of 10
    entries.

 - #interrupt-cells:

    Set '#interrupt-cells' to <1> since the aspeed intc driver does not
    support specifying a trigger type; only the interrupt index is used.

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20251030060155.2342604-2-ryan_chen@aspeedtech.com

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