drm/sun4i: Add VI scaler line size quirk for DE2/DE3

While all RGB scalers have maximum line size of 2048, some YUV scalers
have maximum line size of 2048 and some have line size of 4096.

Since there is no rule for that, add a quirk.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190228200329.11128-3-jernej.skrabec@siol.net