Currently, the devicetree model as well as the board variant name
are shown:
...
Model: TQ TQMa6S/DL on MBa6x
Board: TQMa6DL on a MBa6x
...

Unselect the CONFIG_DISPLAY_BOARDINFO option so that the
board name is printed only once in board_late_init() instead.

Signed-off-by: Fabio Estevam <festevam@denx.de>