wifi: rtw89: coex: Allow Bluetooth doing traffic during Wi-Fi scan

wifi: rtw89: coex: Allow Bluetooth doing traffic during Wi-Fi scan

The Wi-Fi/Bluetooth slot are toggled by firmware timer when Wi-Fi doing
firmware scan, and Wi-Fi slot don't allow Bluetooth do traffic when
Wi-Fi slot. It will trigger Bluetooth audio lag in a random rate, because
Bluetooth can not have enough time slot to keep enough data to play audio.
This patch make Bluetooth can do traffic during Wi-Fi slot, this can help
Bluetooth to collect audio data in time.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://msgid.link/20240418021207.32173-2-pkshih@realtek.com