rtlwifi: btcoex: Add variable ant_div_cfg to support antenna diversity

The variable will be used by btcoex of 8822be, so we prepare this variable
in advance.
Signed-off-by: NPing-Ke Shih <pkshih@realtek.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

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

@@ -1310,6 +1310,7 @@ bool exhalbtc_bind_bt_coex_withadapter(void *adapter)
 			 "[BTCoex], Package Type = Non-TFBGA\n");
 
 	btcoexist->board_info.rfe_type = rtl_get_hwpg_rfe_type(rtlpriv);
+	btcoexist->board_info.ant_div_cfg = 0;
 
 	return true;
 }

drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.h

@@ -153,6 +153,7 @@ struct btc_board_info {
 	bool tfbga_package;
 
 	u8 rfe_type;
+	u8 ant_div_cfg;
 };
 
 enum btc_dbg_opcode {