drm/mediatek: add non-continuous clock mode and EOT packet control

This patch will update dsi clock control method.
1. dsi non-continue clock mode will enhance antistatic effect for panel
2. EOT packet control will judge whether dsi send end of packet or not
by customize

Signed-off-by: shaoming chen <shaoming.chen@mediatek.com>
Signed-off-by: YT Shen <yt.shen@mediatek.com>
Acked-by: CK Hu <ck.hu@mediatek.com>