!4987 net: usb: smsc75xx: Fix uninit-value access in __smsc75xx_read_reg

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/5QQNOQNAWRYVLKYUYHH2K6UK6XVS5YCV/ 
 
https://gitee.com/src-openeuler/kernel/issues/I95AXT 
 
Link:https://gitee.com/openeuler/kernel/pulls/4987

 

Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>