OMAP: DSS2: Support for Innolux AT070TN83

Add support for Innolux AT070TN83, a 7 inch LCD
with RGB-Interface and touch panel to panel-generic-dpi.

Tested with Devkit8000.

Signed-off-by: Thomas Weber <weber@corscience.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>