dvfs: move functionality to secdom core.#22053

lstnl wants to merge 1 commit intonrfconnect:mainnrfconnect/sdk-nrf:mainfrom

lstnl:NRFX-7321-move_DVFS_to_secdomlstnl/sdk-nrf:NRFX-7321-move_DVFS_to_secdomCopy head branch name to clipboard