Merge tag 'signed-efi-v2018.01' of git://github.com/agraf/u-boot

Patch queue for efi - 2017-12-17

A few fixes for 2018.01:

  - Compile fix with helloworld example
  - DP match fix (fixes FreeBSD loader and grub on block storage)
  - More DP fixes for SD, block
  - Fix use-after-free