Merge changes from topic "st_uart_updates" into integration

* changes:
  feat(stm32mp1): add early console in SP_min
  feat(st): properly manage early console
  feat(st-uart): manage STM32MP_RECONFIGURE_CONSOLE
  docs(st): introduce STM32MP_RECONFIGURE_CONSOLE
  feat(st): add trace for early console
  fix(stm32mp1): enable crash console in FIQ handler
  feat(st-uart): add initialization with the device tree
  refactor(stm32mp1): move DT_UART_COMPAT in include file
  feat(stm32mp1): configure the serial boot load address
  fix(stm32mp1): update the FIP load address for serial boot
  refactor(st): configure baudrate for UART programmer
  refactor(st-uart): compute the over sampling dynamically