Merge tag 'u-boot-stm32-20211110' of https://source.denx.de/u-boot/custodians/u-boot-stm

Merge tag 'u-boot-stm32-20211110' of https://source.denx.de/u-boot/custodians/u-boot-stm

- DHSOM update:
   - Remove nWP GPIO hog
   - Increase SF bus frequency to 50Mhz and enable SFDP
   - Disable video output for DHSOM
   - Disable EFI
   - Enable DFU_MTD support
- Create include file for STM32 gpio driver private data
- Split board and SOC STM32MP15 configuration
- Device tree alignement with v5.15-rc6 for STM32MP15
- Add binman support for STM32MP15x
- Normalise newlines for stm32prog
- Update OTP shadow registers in SPL