drm/bridge: ti-sn65dsi86: Reorder remove()

Let's make the remove() function strictly the reverse of the probe()
function so it's easier to reason about.

This patch was created by code inspection and should move us closer to
a proper remove.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210416153909.v4.4.Ifcf1deaa372eba7eeb4f8eb516c5d15b77a657a9@changeid