MLK-18507 drm/bridge: it6263: Filter out known bad display modes

It turns out the following display modes are not well supported
by the bridge - 1600x900@60, 1280x1024@60, 1280x720@30/25/24
and 1152x864@75.  Fortunately, they are not that widely used.
So, list them as the known bad display modes and filter them out
in ->mode_valid().

Signed-off-by: Liu Ying <victor.liu@nxp.com>
(cherry picked from commit c44ed03cf3b85d7f5bc8325ffeec9fd07f66aa87)