arm64: dts: qcom: Use labels with generic node names for ADC channels

As discussed in [1] it is more convenient to use a generic `channel`
node name for ADC channels while storing a friendly - board-specific
instead of PMIC-specific - name in the label, if/when desired to
overwrite the channel description already contained (but previously
unused) in the driver [2]. Follow up on the dt-bindings' `channel` node
name requirement, and instead provide this (sometimes per-board) channel
description through a label property.

Also remove all the unused label references (not to be confused with
label properties) from pm660, pmp8074 and pms405.

[1]: https://lore.kernel.org/linux-arm-msm/20221106193018.270106-1-marijn.suijten@somainline.org/T/#u
[2]: https://lore.kernel.org/linux-arm-msm/20230116220909.196926-4-marijn.suijten@somainline.org/

Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230730-generic-adc-channels-v5-2-e6c69bda8034@somainline.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

arm64: dts: qcom: pm8941-rtc add alarm register

A few descriptions including a qcom,pm8941-rtc describe two reg-names
for the "rtc" and "alarm" register banks, but only one offset.
For consistency with reg-names, add the "alarm" register offset.
No functional change is expected from this.

Signed-off-by: Eric Chanudet <echanude@redhat.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Andrew Halaney <ahalaney@redhat.com> # sa8540p-ride
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221219191000.2570545-5-echanude@redhat.com

arm64: dts: qcom: Use plural _gpios node label for PMIC gpios

The gpio node in PMIC dts'es define access to multiple GPIOs. Most Qcom
PMICs were already using the plural _gpios label to point to this node,
but a few PMICs were left behind including the recently-pulled
pm(i)8950.

Rename it from *_gpio to *_gpios for pm6125, pm6150(l), pm8005,
pm(i)8950, and pm(i)8998.

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221209220450.1793421-1-marijn.suijten@somainline.org

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