video: tegra20: dc: add video bridge support

Rework existing DC driver configuration to support bridges (both external
and internal DSI and HDMI controllers) and align video devices chain logic
with Linux implementation. Additionally, this should improve communication
between DC and internal DSI/HDMI controllers.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
2 files changed