wifi: rtw89: add to fill TX descriptor v2

The format v2 of TX descriptor contains 8-word body and 8-word info, and
fields include packet size, MAC_ID, security key ID and etc.

By design, it can possibly only fill body to reduce overhead, but this
driver keeps thing simple, so always fill body and info currently.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230911082049.33541-4-pkshih@realtek.com