arm64: dts: qcom: Add configuration for PM8950 peripheral

The PM8950 features integrated peripherals like ADC, GPIO controller,
MPPs, PON keys and others.
Add them to DT files that will be imported on boards having this PMIC
combo (or one of them, anyways).

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Co-developed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221111120156.48040-10-angelogioacchino.delregno@collabora.com