tbs2910: migrate to DM_VIDEO

Migration to DM_VIDEO driver is long overdue, configure it in
board config files. To enable the display set stdout like:

  setenv stdout serial,vidconsole

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Soeren Moch <smoch@web.de>
2 files changed