configs: Enable distroboot on am625

TI boards use a custom (though faily common to TI boards) mechanism for
booting Linux. We would like to use the "distroboot" approach.

Enable distroboot as a further option to use for booting on am625 should
the existing options fail.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
2 files changed