drm/bridge/synopsys: stop clobbering drvdata

drm/bridge/synopsys: stop clobbering drvdata

Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
parent driver might need to own this. Instead, let's return our
'dw_mipi_dsi' object and have callers pass that back to us for removal.

Signed-off-by: Brian Norris <[email protected]>
Reviewed-by: Matthias Kaehlcke <[email protected]>
Reviewed-by: Archit Taneja <[email protected]>
Acked-by: Philippe Cornu <[email protected]>
Signed-off-by: Andrzej Hajda <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]