Merge changes from topic "st_dt_update" into integration

* changes:
  fix(fdts stm32mp1): update PLL nodes for ED1/EV1 boards
  fix(fdts stm32mp1): set ETH clock on PLL4P on ST boards
  feat(fdts stm32mp1): delete nodes for non-used boot devices
  fix(fdts stm32mp1): use 'kHz' as kilohertz abbreviation
  refactor(fdts stm32mp1): move STM32MP DDR node
  feat(fdts stm32mp1): align DT with latest kernel