rtlwifi: btcoex: 21a 1ant: re-init coex after wifi leaves IPS

rtlwifi: btcoex: 21a 1ant: re-init coex after wifi leaves IPS

Before entering IPS, set the PTA control to default value and re-init it
after it leaves IPS to avoid running some redundant code in
run_coexist_mechanism.

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>