!9597 ASoC: max9759: fix underflow in speaker_gain_control_put()

Merge Pull Request from: @ci-robot 
 
PR sync from: Wenyu Huang <huangwenyu5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/42EUWSALJMWFLLD3P3Y524W5B3RNLUP5/ 
 
https://gitee.com/src-openeuler/kernel/issues/IA72GH 
 
Link:https://gitee.com/openeuler/kernel/pulls/9597

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Reviewed-by: Zucheng Zheng <zhengzucheng@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>