arm64: dts: qcom: sm8150: Add secondary USB and PHY nodes

Add dts nodes for the secondary USB controller and related PHY nodes.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Link: https://lore.kernel.org/r/20200609194030.17756-6-jonathan@marek.ca


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