arm64: dts: qcom: sdm670: add osm l3

Add the interconnect node for L3 cache on SDM670.

Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230802011548.387519-8-mailingradian@gmail.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>