avos fa0604f793 iwn: some initialization / RF switch state change fixes.
- Check return code from initialization path; otherwise, vap state
may be wrong after an error.
- Do not try to run iwn_stop() / iwn_init() multiple times.
- Merge iwn_radio_on/off() and move RFKILL bit check into the task.
- Try to handle possible RF switch state change in S3 state (PR 181694).

PR:		181694
Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D9797
2017-02-25 00:40:50 +00:00
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