!3310 kasan: fix the compilation error for memcpy_mcs()

Merge Pull Request from: @ci-robot 
 
PR sync from: Tong Tiangen <tongtiangen@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/CERY3FBRIPMTXMPZ5BKP5HIGIA2V6YAT/ 
 
https://gitee.com/openeuler/kernel/issues/I8MWHA 
 
Link:https://gitee.com/openeuler/kernel/pulls/3310

 

Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>