configs: stm32mp25: enable DISTRO_DEFAULT and BOOTCOMMAND

configs: stm32mp25: enable DISTRO_DEFAULT and BOOTCOMMAND

Enable DISTRO_DEFAULT and BOOTCOMMAND flags for stm32mp25

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Cover-letter:
arm: stm32mp: STM32MP25 machine update

This series is updating STM32MP25 machine/board support:
  _ update cmd_stm32key.
  _ update cmd_stm32prog.
  _ update STM32MP25 configs.
  _ add leds and buttons support.
  _ add boot_mode support (USB/PXE/MMC/NOR/NAND).
  _ add bootcmd support.
  _ enable MMC support.

Currently, it misses clock,reset and regulator support for STM32MP25
which will be added in a next step due to dependencies with OP-TEE.
For example, due to OP-TEE dependencies, all MMC support is ready
but not functional.

END

Series-version: 2

Series-changes: 2
  - Enable DISTRO_DEFAULT and BOOTCOMMAND flags