ARM: dts: exynos: align gpio-key node names with dtschema
The node names should be generic and DT schema expects certain pattern
(e.g. with key/button/switch).
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220609114047.380793-8-krzysztof.kozlowski@linaro.org