ARM: dts: qcom: Add second trip to skin-msm-therm-usr for kona

There are two clients in userspace who can request different trip
thresholds to skin-msm-therm. Add another thermal zone trip node
to skin-msm-therm for second client to configure its own threshold.

Change-Id: I9e507713987826c23c16062274b86d804795eeb3