wifi: rtw89: coex: Assign priority table before entering power save

When Wi-Fi firmware scan, it will update the priority tables, and if
stay at these priority tables then enter power saving will trigger
Bluetooth issues. So update the priority before entering power saving.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250616090252.51098-8-pkshih@realtek.com