Add i2c bus number for DVI output for boards with DVI output where the
i2c bus has been confirmed to be connected and working. The driver uses
this to detect if a panel is connected and to read EDID.
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>