drm/kmb: Enable ADV bridge after modeset

drm/kmb: Enable ADV bridge after modeset

On KMB, ADV bridge must be programmed and powered on prior to
MIPI DSI HW initialization.

v2: changed to atomic_bridge_chain_enable (Sam)

Fixes: cbc8c493852f ("drm/kmb: Mipi DSI part of the display driver")
Co-developed-by: Edmund Dea <edmund.j.dea@intel.com>
Signed-off-by: Edmund Dea <edmund.j.dea@intel.com>
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211019230719.789958-1-anitha.chrisanthus@intel.com
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>