Add AP mode configuration

For AP mode set correct type in smd_config_sta
and call smd_config_sta from sta_add ops.

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Announce WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD

Notify upper layers that HW supports  probe_rsp offloading

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Fix memory leakage

Whenever skb is requested from mac80211 do not forget
to free it.

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>