Merge tag 'u-boot-stm32-20250312' of https://source.denx.de/u-boot/custodians/u-boot...

Merge tag 'u-boot-stm32-20250312' of https://source.denx.de/u-boot/custodians/u-boot-stm into next

CI: https://source.denx.de/u-boot/custodians/u-boot-stm/-/pipelines/25112

- Add drivers for MFD STM32 TIMERS and STM32 PWM and enable them on stm32mp135f-dk
- Restrict _debug_uart_init() usage in STM32 serial driver
- Add support for environment in eMMC on STM32MP13xx DHCOR SoM
- Introduce DH STM32MP15xx DHSOM board specific defconfigs
- Fix CONFIG_BOOTCOUNT_ALTBOOTCMD update on DH STM32MP1 DHSOM
- Update maintainer for board stm32f746-disco
- Fix Linux cmdline for stm32f769-disco
- Cleanup in stm32f***-u-boot.dtsi and in board_late_init() by removing
  legacy led and button management.