arm64: dts: qcom: sm7225-fairphone-fp4: Add pmk8350 PMIC

The PMK8350 (which is actually a PMK8003) is used for the RTC and has
ADC for thermals.

Since the adc_tm compatible used in PMK8350 is not yet supported, skip
configuring that and the associated thermal zone for now.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221207084045.270172-1-luca.weiss@fairphone.com