arm64: dts: qcom: sdm630-xperia-nile: Add all RPM and fixed regulators

Add all of the RPM PM660/PM660L regulators and the fixed ones,
defining the common electrical part of this platform.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210728222542.54269-30-konrad.dybcio@somainline.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>