u-boot: Upgrade AST2400 machines to 2016.05 tree.

Move 2016.05 tree to point at the latest openbmc commit and point
all AST2400 machines to it.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
3 files changed
tree: 0fe13a91353931d64d0a4c55419a2a948f05aa24
  1. conf/
  2. meta-firestone/
  3. meta-garrison/
  4. meta-palmetto/
  5. meta-witherspoon/