Remove struct size hacks in net80211

[waddlesplash]

As in title: FreeBSD 12 introduced some new fields in net80211 ioctls that I've held off on adding for the time being so that we preserve ABI compatibility (mostly for wpa_supplicant.) Before beta2, we should remove these hacks, add the new fields, and then rebuild wpa_supplicant.

[kallisti5]

Is this one really a blocker for R1 Beta2?

[pulkomandy]

Not really, but it's not a lot of work and there's an ABI change, so just before a release would be better.

[pulkomandy]

For reference, the following parts should be reviewed:

/Git/haiku/haiku/src/libs/compat/freebsd_wlan/net80211> git grep __HAIKU__
ieee80211.c:#ifndef __HAIKU__
ieee80211_ioctl.c:#ifdef __HAIKU__
ieee80211_ioctl.c:#ifndef __HAIKU__
ieee80211_ioctl.c:#ifndef __HAIKU__
ieee80211_ioctl.c:#ifdef __HAIKU__
ieee80211_ioctl.c:#ifdef __HAIKU__
ieee80211_ioctl.c:#ifdef __HAIKU__
ieee80211_ioctl.c:#ifndef __HAIKU__
ieee80211_ioctl.h:#ifdef __HAIKU__
ieee80211_ioctl.h:#ifndef __HAIKU__
ieee80211_ioctl.h:#if defined(__FreeBSD__) || defined(__HAIKU__)
ieee80211_ioctl.h:#ifdef __HAIKU__
ieee80211_ioctl.h:#endif /* __HAIKU__ */
ieee80211_ioctl.h:#ifdef __HAIKU__
ieee80211_output.c:#ifdef __HAIKU__
ieee80211_output.c:#ifndef __HAIKU__
ieee80211_ratectl.c:#ifndef __HAIKU__
ieee80211_scan.c:#ifdef __HAIKU__
ieee80211_var.h:#elif defined(__HAIKU__)

[pulkomandy]

​https://review.haiku-os.org/c/haiku/+/2225

[nielx]

Ready to go, can be applied just before the branch date.

[waddlesplash]

Merged in hrev54039.