configs: stm32mp25: add support of NAND and NOR boot

configs: stm32mp25: add support of NAND and NOR boot

Add support of UBI boot and activate the needed
configuration for U-Boot environment in UBI volume for
NAND or in a MTD partition for NOR device, SPI Flash:
ENV_OFFSET, ENV_OFFSET_REDUND, ENV_SECT_SIZE is
aligned with the default MTD partition on NOR device
of the STMicroelectronics boards.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>