Revert "USB: misc: Add onboard_usb_hub driver"

This reverts commit b4e32616 as the
patch series is causing build issues in linux-next at the moment.

Cc: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/YMuRcrE8xlWnFSWW@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>