eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD

eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD

Commit ee62c6b2dc93 ("eventfd: change int to __u64 in eventfd_signal()")
forgot to change int to __u64 in the CONFIG_EVENTFD=n stub function.

Link: https://lkml.kernel.org/r/20221124140154.104680-1-zhangqilong3@huawei.com
Fixes: ee62c6b2dc93 ("eventfd: change int to __u64 in eventfd_signal()")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Cc: Dylan Yudaken <dylany@fb.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sha Zhengju <handai.szj@taobao.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>