multicore build error (15)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 813d237ed569 Remove OpenSSL versions of HKDF*().
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=139f75d8f00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=9864ba1338526d0e8aca

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9864ba...@syzkaller.appspotmail.com

sys/kern/kern_time.c:785:28: error: initializer element is not a compile-time constant
sys/kern/kern_time.c:814:28: error: initializer element is not a compile-time constant

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