tc_setclock: don't print a warning if tc_windup() rejects inittodr(9) time

tc_setclock: don't print a warning if tc_windup() rejects inittodr(9) time

During resume, it isn't necessarily a problem if the UTC time we get
from inittodr(9) lags behind the system UTC clock.  In particular, if
the active timecounter's frequency is low enough, tc_delta() might not
overflow across a brief suspend.

Remove the misleading warning message.  The code is behaving as
intended, just not in a way I anticipated when I added the warning
message a few years ago.

Discovered by kettenis@.  Root cause isolated with kettenis@.

Link: https://marc.info/?l=openbsd-tech&m=166790845619897&w=2
ok mlarkin@ kettenis@