Make sure qwx(4) always calls refcnt_init() before other refcnt functions.

Make sure qwx(4) always calls refcnt_init() before other refcnt functions.

I recently enabled automatic recovery from firmware crashes. if loading
firmware at boot would fail with a firmware error then the init task would
call refcnt_finalize() via qwx_stop() before refcnt_init() was called and
trigger a KASSERT in the refcnt code.

ok patrick@, who also reported the problem to me and tested the fix