This completes the support for ccimx6sbc variants:
* support device tree variants
* split variants '0x01,0x02,0x04' group in two different groups (with or
without kinetis)
https://jira.digi.com/browse/DEL-1359
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
(cherry picked from commit 3f20015411f4e270b2e2c8faf292678c75ff2aff)