From: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
Although the alpha channel in XRGB formats can be ignored, ALPHA_CON
must be configured accordingly when using XRGB formats or it will still
affects CRC generation.
Fixes: d886c0009bd0 ("drm/mediatek: Add ETHDR support for MT8195")
Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>