This adds a primitive board configuration for the UP Squared board to
work properly with SBL(Slim Bootloader).
- https://github.com/slimbootloader/slimbootloader
- https://slimbootloader.github.io/
BOARD shall be 'up_squared_sbl'
cmake -GNinja -DBOARD=up_squared_sbl ..
ninja
Signed-off-by: Aiden Park <aiden.park@intel.com>
Aiden Park