arm64: dts: qcom: sm6115-pro1x: fix incorrect gpio-key,wakeup

arm64: dts: qcom: sm6115-pro1x: fix incorrect gpio-key,wakeup

Use 'wakeup-source' instead of 'gpio-key,wakeup' to indicate key can
wake-up the device:

  sm6115-fxtec-pro1x.dtb: gpio-keys: key-volume-up: Unevaluated properties are not allowed ('gpio-key,wakeup' was unexpected)

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230617171541.286957-15-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>