Merge tag 'dm-pull-15oct19' of https://gitlab.denx.de/u-boot/custodians/u-boot-dm

Merge tag 'dm-pull-15oct19' of https://gitlab.denx.de/u-boot/custodians/u-boot-dm

binman enhancements:
- Dropping some test Elf files and building them from source instead
- Refactoring of x86 16-bit entries
- Support for SPL symbols within sections
- Handle the 'notes' sections and hidden symbols in recent binutils
- Improved error reporting with a tool fails

libfdt and documentation fixes
vboot required-key test
driver model power-domain controls
patman Message-Id enhancement