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As all level 2 and level 3 caches are unified, add required cache-unified and cache-level properties to fix warnings like: lg1312-ref.dtb: l2-cache0: 'cache-level' is a required property Acked-by: Chanho Min <chanho.min@lge.com> Link: https://lore.kernel.org/r/20230421223201.115439-1-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>