Merge changes from topic "stm32mp2_bl2_updates" into integration
* changes:
feat(stm32mp2): load fw-config file
feat(stm32mp2): add fw-config compilation
feat(stm32mp2-fdts): add fw-config files for STM32MP257F-EV1
feat(stm32mp2-fdts): add fw-config file
feat(stm32mp2-fdts): add clock tree for STM32MP257F-EV1
feat(stm32mp2): enable DDR sub-system clock
feat(stm32mp2): add fixed regulators support
feat(stm32mp2): print board info
feat(stm32mp2): display CPU info
feat(stm32mp2): get chip ID
feat(stm32mp2): add BL2 boot first steps
feat(stm32mp2): add defines for the PWR peripheral
feat(stm32mp2-fdts): add SD-card and eMMC support on STM32MP257F-EV1
feat(stm32mp2-fdts): add sdmmc pins definition
feat(stm32mp2-fdts): add sdmmc nodes in SoC DT file
feat(stm32mp2-fdts): add io_policies
feat(stm32mp2-fdts): remove pins-are-numbered