ARM: omap3-igep0020.dts: add display information

Add DT data for OMAP3 IGEPv2 board. The board has the following displays:

dvi: uses TFP410 encoder to convert DPI to DVI

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>