Add configuration files for TrimSlice board

This content of the configuration files mainly comes from commit d16cda0
"Add sample .cfg files for MMC and SPI boot" from
git://gitorious.org/cbootimage/cbootimage.git trimslice
authored by Konstantin Sinyuk <kostyas@compulab.co.il>.

* Create configs/${board} layout for config files.
* Add configurations for Trimslice, booting from SPI and MMC/SD.
* Create separate BCT- and image-generation config files.
* Add OdmData, based on Compulab's U-Boot code, with debug UART value fixed
  to be UART A not UART D.
* Switch U-Boot load/entry address from 0x00e08000 to 0x00108000 to match
  upstream U-Boot.
* Set Bctcopy=1 for MMC, to match the recovery images provided by Compulab.
* Add script to build the BCTs and images
* Add .gitignore file

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Change-Id: Ic1dd11f387d774cb67ac1115db725210b255bb03
Reviewed-on: https://gerrit.chromium.org/gerrit/23373
Reviewed-by: Simon Glass <sjg@chromium.org>
6 files changed