arm64: dts: qrb5165-rb5: port thermal zone definitions

Add thermal zones definitions basing on the downstream kernel.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210119054848.592329-6-dmitry.baryshkov@linaro.org


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