arm64: dts: qcom: sm6115-j606f: Add ramoops node

Add a ramoops node to enable retrieving crash logs.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230406-topic-lenovo_features-v2-1-625d7cb4a944@linaro.org