[PATCH v2] ARM: dts: imx: add ZII RDU1 board

[Nikita Yushchenko]

> This adds support for the Zodiac Inflight Innovations RDU1 board,
> which is based on the i.MX51.
> 
> It is the predecessor of the already supported ZII RDU2 board and
> relies on the bootloader in the same way to enable correct display
> and touchscreen nodes.
> 
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>

Tested-by: Nikita Yushchenko <nikita.yoush at cogentembedded.com>

Board boots ok. DSA works. Display works.