arm64: dts: qcom: qcm6490-fairphone-fp5: Add thermistor for UFS/RAM

Configure the ADC and thermal zone for the thermistor next to the
UFS+RAM chip which is connected to GPIO_12 of PM7250B. It is used to
measure the temperature of that area of the PCB.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20241002-fp5-ufs-therm-v1-1-1d2d8c1f08b5@fairphone.com


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