ARM: dts: imx6q: add Novena board

Novena is an open-hardware laptop/desktop/bare board.

See http://www.kosagi.com/w/index.php?title=Novena_Main_Page



Signed-off-by: Sean Cross <xobs@kosagi.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>