Revert "Revert "drm/bridge: ti-sn65dsi86: Implement bridge connector operations for DP""

This commit was accidentally reverted instead of another commit, and
therefore needs to be reinstated.

This reverts commit 8c9c40ec.

Fixes: 8c9c40ec ("Revert "drm/bridge: ti-sn65dsi86: Implement bridge connector operations for DP"")
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220919102009.150503-2-robert.foss@linaro.org