wifi: mac80211: Fix ack frame idr leak when mesh has no route

wifi: mac80211: Fix ack frame idr leak when mesh has no route

When trying to transmit an data frame with tx_status to a destination
that have no route in the mesh, then it is dropped without recrediting
the ack_status_frames idr.

Once it is exhausted, wpa_supplicant starts failing to do SAE with
NL80211_CMD_FRAME and logs "nl80211: Frame command failed".

Use ieee80211_free_txskb() instead of kfree_skb() to fix it.

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Link: https://lore.kernel.org/r/20221027140133.1504-1-nicolas.cavallari@green-communications.fr
Signed-off-by: Johannes Berg <johannes.berg@intel.com>