drm/bridge: Improve overview documentation

Clean up the drm_bridge overview documentation, and expand the
operations documentation to provide more details on API usage.

Signed-off-by: Laurent Pinchart <[email protected]>
Reviewed-by: Daniel Vetter <[email protected]>
Signed-off-by: Tomi Valkeinen <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2 files changed