From: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
In order to match the changes of "Use the drm_panel_bridge API",
the poweron/poweroff of dsi is extracted from enable/disable and
defined as new funcs (pre_enable/post_disable).
Fixes: 2dd8075d2185 ("drm/mediatek: mtk_dsi: Use the drm_panel_bridge API")
Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
Signed-off-by: Xinlei Lee <xinlei.lee@xxxxxxxxxxxx>