!7965 nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells

Merge Pull Request from: @ci-robot 
 
PR sync from: Cai Xinchen <caixinchen1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/CZGJDYGA4ELFU36HTBADOL7YAW7GABEZ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9RD7J 
 
Link:https://gitee.com/openeuler/kernel/pulls/7965

 

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