- Mostly sync with OpenBSD
- Serialise sending commands to the firmware
- Remove redundant calls to bpfdetach.
- use bus_size_t where appropriate and not fetch iobase as it's not
used.
- improve 802.11 radiotap support (correct rx rate)
- add short preamble flag
- add short slot time support
- ignore parity errors (as per the Linux driver)
- Set Tx power for all channels.
- disable bluetooth co-existance
- Check that ni->ni_rates.rs_nrates is not greater than the maximum
handled by the firmware.
- Begin syncing with the FreeBSD driver by renaming a few things.