rtlwifi: btcoex: 21a 2ant: let PTA circuit control the switch

Register 0xcb4 determines if the PTA circuit can control the swtich
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>

drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c

@@ -1109,7 +1109,6 @@ static void btc8821a2ant_set_ant_path(struct btc_coexist *btcoexist,
 		btcoexist->btc_write_4byte(btcoexist, 0x4c, u4tmp);
 
 		btcoexist->btc_write_4byte(btcoexist, 0x974, 0x3ff);
-		btcoexist->btc_write_1byte(btcoexist, 0xcb4, 0x77);
 
 		if (board_info->btdm_ant_pos == BTC_ANTENNA_AT_MAIN_PORT) {
 			/* tell firmware "antenna inverse"  ==> WRONG firmware