jhb 9cc63a16af Add locking to mly(4) and mark MPSAFE.
- Add a per-softc mutex.
- Use mutex as CAM sim lock.
- Use taskqueue_thread instead of taskqueue_swi_giant.
- Use callout(9) instead of timeout(9).
- Use bus_*() instead of bus_space_*().

Tested by:	no one
2014-11-18 21:55:50 +00:00
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