wifi: rtw89: coex: Add version code for Wi-Fi firmware coexistence control

The newer Wi-Fi firmware are all changed to "Not to send H2C to
mention firmware how many call flow step should firmware trace".
The structure had removed the member, and define the steps number
at newer version firmware.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230106120844.17441-2-pkshih@realtek.com