ARM: board: udoo: Import UDOO dts files

Import the i.MX6 based UDOO dts files from Linux 5.12-rc1.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>