ARM: dts: qcom: msm8974: add interconnect nodes

Add interconnect nodes that's needed to support bus scaling.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Link: https://lore.kernel.org/r/20191024103140.10077-5-masneyb@onstation.org


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