Merge tag 'u-boot-stm32-20260129' of https://source.denx.de/u-boot/custodians/u-boot-stm

- spi: stm32: OSPI and QSPI optimization
- Update stm32 clock drivers to restore boot for STM32MP13/STM32MP2
  board family
- Add bootph-all in ltdc node in stm32mp257f-ev1-u-boot
- Use CONFIG_STM32MP15X to discern STM32MP15xx on DH STM32MP15xx DHSOM
- Reinstate missing SPL configs for DH STM32MP15xx DHSOM
- stm32mp2 boards: read boot index from backup register
- video: simple_panel: add support for "rocktech,rk043fn48h" display
- Add .of_to_plat callback in stm32_ltdc driver