arm64: dts: qcom: qcm6490-fairphone-fp5: Add PM7250B thermals

Configure the thermals for the CHARGER_SKIN_THERM and USB_CONN_THERM
thermistors connected to PM7250B.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20231013-fp5-thermals-v1-2-f14df01922e6@fairphone.com


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