Drop the RAVB bit from the board since RAVB now probes from DT instead.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org>