wifi: rtw89: implement C2H TX report handler

wifi: rtw89: implement C2H TX report handler

rtw89 has several ways of handling TX status report events.  The first one
is based on RPP feature which is used by PCIe HCI.  The other one depends
on firmware sending a corresponding C2H message, quite similar to what
rtw88 has.

Toggle a bit in the TX descriptor to indicate to the firmware that TX
report for the frame is expected.   This will allow handling TX wait skbs
and the ones flagged with IEEE80211_TX_CTL_REQ_TX_STATUS correctly.

Do the bulk of the patch according to the vendor driver for RTL8851BU.
However, there are slight differences in C2H message format between
different types of chips.  RTL885xB ones follow format V0.  RTL8852C has
format V1, and RTL8922AU has format V2.

Found by Linux Verification Center (linuxtesting.org).

Suggested-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251104135720.321110-6-pchelkin@ispras.ru