Following Criticism By Linus Torvalds, GenPD Subsystem Renamed To "pmdomain"

During the Linux 6.6 merge window a pull request submitted the new "GenPD" subsystem. While the pull request did land for Linux 6.6, Linus Torvalds took issue with it -- not because of the code but over the lack of clarity on what "GenPD" is for those not domain experts in this area. To help clear things up, GenPD is being renamed to "pmdomain" to provide a bit more clarity...