board: asus: tf700t: bind tc358768 bridge and panel

Of all T30 transformers, only the TF700T has a FullHD DSI panel,
which is connected via tc358768 RGB to DSI bridge. Since the
bridge driver is available now, TF700T can have video support.

Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS TF700T
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>