Merge tag 'u-boot-stm32-20191126' of https://gitlab.denx.de/u-boot/custodians/u-boot-stm

- Solve warning for stih410-b2260
- Device tree alignment on v5.4-rc4 for all stm32 boards
- Correct the eMMC pin configuration on stm32mp157c-ev1
- Add DFU and SPI-NAND support for stm32mp1 board