rtlwifi: btcoex: 21a 1ant: consider more cases when bt inquiry

With bt inquiry, the wifi may start as a softap or the wifi and bt are
busy, we take these scenarios into consider to avoid bt inquiry to
degrade the performance of the network

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Pkshih <pkshih@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>