ath10k: improve tx status reporting

We use ieee80211_tx_status() to report each completed tx frame.
Internally, this function calls sta_info_get_by_addrs(), what has a
couple of drawbacks:
1. additional station lookup causes a performance degradation;
2. mac80211 can not properly account Ethernet encapsulated frames due
   to the inability to properly determine the destination (station) MAC
   address since ieee80211_tx_status() assumes the frame has a 802.11
   header.

The latter is especially destructive if we want to use hardware frames
encapsulation.

To fix both of these issues, replace ieee80211_tx_status() with
ieee80211_tx_status_ext() call and feed it station pointer from the tx
queue associated with the transmitted frame.

Tested-on: QCA9888 hw2.0 PCI 10.4-3.9.0.2-00131
Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00157-QCARMSWPZ-1

Signed-off-by: Sergey Ryazanov <[email protected]>
Tested-by: Oldřich Jedlička <[email protected]> # TP-Link Archer C7 v4 & v5 (QCA9563 + QCA9880)
Tested-by: Edward Matijevic <[email protected]> # TP-Link Archer C2600 (IPQ8064 + QCA9980 10.4.1.00030-1)
Tested-by: Edward Matijevic <[email protected]> # QCA9377 PCI in Sta mode
Tested-by: Zhijun You <[email protected]> # NETGEAR R7800 (QCA9984 10.4-3.9.0.2-00159)
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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