boards: Fixes and updates to chromebook docs

  - Fix some typos.

  - Update the docs about flashing and the debugging interfaces to
    reflect the latest changes in the internal collabora-lava-setup

  - Add device-specific info about the actual devices present in the
    Collabora LAVA lab.
Signed-off-by: Ricardo Cañuelo Navarro's avatarRicardo Cañuelo <>
parent f7ab2ff6
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