ARM: dts: exynos: align status led name with bindings on Origen4210

The "status" is a reserved keyword and LED nodes should have generic
prefix:

  exynos4210-origen.dtb: leds: status: {'gpios': [[76, 3, 1]],
    'function': ['heartbeat'], 'linux,default-trigger': ['heartbeat']} is not of type 'array'

Link: https://lore.kernel.org/r/20230207210020.677007-4-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>