arm64: dts: qcom: sm8150-kumano: Enable SDHCI2

Set up and enable SDHCI2 to enable the microSD slot on Kumano
devices.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230315-topic-kumano_dts0-v2-4-0ca7fa521b86@linaro.org