drm/bridge: ti-sn65dsi86: Simplify using pm_runtime_resume_and_get()

pm_runtime_resume_and_get() already drops the runtime PM usage counter
in the error case. So a call to pm_runtime_put_sync() can be dropped.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231123175425.496956-2-u.kleine-koenig@pengutronix.de