openbsd build error (17)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: c0f44e363efa vmm(4): add quiesce/wakeup hooks to sync vcpu..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=13cc7ec7700000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=33bf29d08bfc341c3129

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+33bf29...@syzkaller.appspotmail.com

sys/arch/amd64/amd64/vmm.c:499:11: error: implicit declaration of function 'vmx_remote_vmclear' is invalid in C99 [-Werror,-Wimplicit-function-declaration]

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

[Anton Lindqvist]

#syz fix: Put call to vmx_remote_vmclear() under #ifdef MULTIPROCESSOR to unbreak build of amd64 GENERIC