[sdm845+sm6350 branch] In-kernel PD mapper and related regressions

Related to #11 (closed) , that was closed through !6 (merged) by importing the patch from pmOS that returns before the in-kernel PD mapper does anything.

Now pmOS folks dropped the patch in favour of not compiling the in-kernel PD mapper, dropping QCOM_PD_MAPPER from their config . Same in the config from sdm845-mainline/linux project.

I'm not able to find CONFIG_QCOM_PD_MAPPER in our qcom_defconfig, yet it still seems to be included in the compiled Mobian kernel (took 6.12.41-qcom image from our repo)

This is a reminder to check what other kconfig is selecting QCOM_PD_MAPPER, so that we can disable it cleanly and drop the patch (after testing everything still works).