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