scsi: ufs: ufs-mediatek: Add put_device() after of_find_device_by_node()

This was found by coccicheck:

./drivers/scsi/ufs/ufs-mediatek.c, 211, 1-7, ERROR missing put_device;
call of_find_device_by_node on line 1185, but without a corresponding
object release within this function.

Link: https://lore.kernel.org/r/20211110105133.150171-1-ye.guojin@zte.com.cn


Reported-by: Zeal Robot <zealci@zte.com.cn>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Ye Guojin <ye.guojin@zte.com.cn>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>