trace: Fix kabi breakage in struct trace_event_file

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I90MN1


CVE: NA

--------------------------------

Fix kabi breakage in commit e7f2394341aa ("tracing: Have
trace_event_file have ref counters")

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
(cherry picked from commit 2a31c8d1)