Merge changes from topic "st_uart_update" into integration
* changes:
feat(st): protect UART during platform init
feat(stm32mp1): update console management for SP_min
refactor(stm32mp1): improve console management in BL2
feat(plat/st): add a function to configure console
feat(stm32mp1): add stm32_get_boot_interface function
refactor(stm32mp1): move stm32_save_boot_interface()
fix(stm32mp1): deconfigure UART RX pins
feat(stm32_gpio): add a function to reset a pin
refactor(stm32mp1): sort compilation flags
feat(stm32mp1): add sign-compare warning