The die-temp vadc channels are not defined for the CRD, but describing
them directly would directly duplicate the definition from the Lenovo
Thinkpad X13s DeviceTree.

The sc8280xp-pmics file describes the common configuration of PMK8280,
two PMC8280, PMC8280C, and PMR735a. As such, even though these vadc
channels makes references across PMICs, it's suitable to define them in
the shared file.

Do this, and enable the pmk8280 vadc for the CRD.
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240210-sc8280xp-pmic-thermal-v1-1-a1c215a17d10@quicinc.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>