dt-bindings: interrupt-controller: brcm,bcm2836-l1-intc: Drop interrupt-controller requirement

Since commit 88bbe85d ("irqchip: bcm2836: Move SMP startup code to
arch/arm (v2)") the bcm2836-l1-intc block on bcm2711 is only used as a
base address for the smp_boot_secondary hook on 32 bit kernels. It is
not used as an interrupt controller.

Drop the binding requirement for interrupt-controller and interrupt-cells
to satisfy validation on this platform.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20241220-dt-bcm2712-fixes-v5-3-cbbf13d2e97a@raspberrypi.com


Signed-off-by: Rob Herring (Arm) <robh@kernel.org>