Squashed 'firmware/xboot/' changes from d45d0c2..924689f
Squashed 'firmware/xboot/' changes from d45d0c2..924689f

924689f Added configuration for Mongoose IMU board

git-subtree-dir: firmware/xboot
git-subtree-split: 924689fe1fe1701cccb2b8e2ee5a68fcc5aa075e

alexforencich/xgrid,alexforencich/xgrid,alexforencich/xgrid