Merge tag 'clk-2024.04-rc2' of https://source.denx.de/u-boot/custodians/u-boot-clk

Clock changes for v2024.04

This pull has the usual fixes and new (clock-adjacent) drivers. It also has some
cleanups for the clock API; in particular removing the unused rfree callback.

CI: https://source.denx.de/u-boot/custodians/u-boot-clk/-/pipelines/19486