run: rum: migrate to new net80211 encryption key API

[adrian]

Summary

Migrate to the new encryption key API rather than poking at the
key struct directly.

Locally tested:

• STA mode - run0: MAC/BBP RT2860 (rev 0x0101), RF RT2820 (MIMO 2T2R), address 00:0e:2e:e5:ae:3a

[bz]

sys/dev/usb/wlan/if_run.c

2378

We really should just remove these and no longer allow them.
I think what I am trying to say is: remove that TODO comment.

[adrian]

sys/dev/usb/wlan/if_run.c

2378

you mean no longer allow WEP?

I still occasionally use WEP because I want to build a private network for old devices. It's still there.

[bz]

sys/dev/usb/wlan/if_run.c

2378

You are worse than TKIP users ;-) We still do support OPEN for that :)

Well, does it really make sense to touch all the "legacy" drivers and change a check into a bool inline function, just because?

WEP needs to die die die or at least start hiding behind extra pain not introduce more work for no good?