arm64: dts: mediatek: mt8173: correct GPIO keys wakeup

gpio-keys,wakeup is a deprecated property.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230304123301.33952-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>