configs: Add support for Solidrun's MX6 Cubox/Hummingboard

Add support for Solidrun's MX6 Cubox/Hummingboard.

For more information about these boards, please check:

https://www.solid-run.com/freescale-imx6-family/hummingboard/
https://www.solid-run.com/freescale-imx6-family/cubox-i/

U-Boot is capable of detecting the version of the board in run-time
and loads the correct dtb.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
6 files changed