wlan: add some calls to ieee80211_set_driver_keymgmt_suites()

[adrian]

Summary

It's very possible that almost all of the ciphers will work just
fine on all of the NICs we currently support, but for now net80211
hasn't flipped it on by default.

So, enable WPA/WPA2 PSK and WPA-PSK-256 keysuites for further
testing. wpa_supplicant / hostapd won't use these until the
new key management support bitmap is provided up to wpa_supplicant
and hostapd.

[adrian]

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