FROMLIST: drm/bridge: add support for lontium lt9211c bridge

LT9211c is a Single/Dual-Link DSI/LVDS or Single DPI input to
Single-link/Dual-Link DSI/LVDS or Single DPI output bridge chip.
Extend the existing lontium-lt9211 driver to support DSI-to-LVDS
bridge configuration.

Signed-off-by: Yi Zhang <zhanyi@qti.qualcomm.com>
Signed-off-by: Nilesh Laad <nilesh.laad@oss.qualcomm.com>
Signed-off-by: Gopi Botlagunta <venkata.botlagunta@oss.qualcomm.com>
Link: https://lore.kernel.org/lkml/20251224-add-lt9211c-bridge-v4-2-406e73ec28c5@oss.qualcomm.com/

Author: Yi Zhang