drm/tidss: Set max DMA segment size

We have no segment size limitations. Set to unlimited.

Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220823001634.11461-1-afd@ti.com