!5046 usb: gadget: f_fs: Clear ffs_eventfd in ffs_data_clear.

Merge Pull Request from: @ci-robot 
 
PR sync from: Zeng Heng <zengheng4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FP4KINCQ4VAN4QON2WC4RNUZICW2KQGA/ 
 
https://gitee.com/src-openeuler/kernel/issues/I947SJ 
 
Link:https://gitee.com/openeuler/kernel/pulls/5046

 

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