can: flexcan: using pm_runtime_resume_and_get instead of pm_runtime_get_sync

Using pm_runtime_resume_and_get is more appropriate
for simplifing code

Link: https://lore.kernel.org/all/20220419081449.2574026-1-chi.minghao@zte.com.cn


Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>