Return value from softing_startstop() directly instead of taking this
in another redundant variable.

Link: https://lore.kernel.org/all/20220112080629.667191-1-chi.minghao@zte.com.cnReported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: NCGEL ZTE <cgel.zte@gmail.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>