arm64: dts: qcom: sm6350: Add OSM L3 node

Enable the OSM block responsible for scaling the L3 cache.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230104171643.1004054-2-konrad.dybcio@linaro.org