Merge tag 'u-boot-stm32-20231215' of https://source.denx.de/u-boot/custodians/u-boot-stm into next

_ run savedefconfig on all STM32 defconfig

STM32 MCU:
_ Sync stm32f469-disco DT with Linux 6.5
_ rework ltdc node for stm32f769-disco
_ clk: stm32f: Fix settings for LCD_CLK
_ Support display on stm32f469-disco board

STM32 MPU:
_ stm32mp_dfu : Fix board_get_alt_info_mtd()
_ stm32mp_dfu : Simplify MTD device parsing