rtw89: Remove redundant check of ret after call to rtw89_mac_enable_bb_rf

The function rtw89_mac_enable_bb_rf is a void return type, so there is
no return error code to ret, so the following check for an error in ret
is redundant dead code and can be removed.

Addresses-Coverity: ("Logically dead code")
Fixes: e3ec7017 ("rtw89: add Realtek 802.11ax driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211015152113.33179-1-colin.king@canonical.com

drivers/net/wireless/realtek/rtw89/mac.c

@@ -2656,8 +2656,6 @@ int rtw89_mac_init(struct rtw89_dev *rtwdev)
 		goto fail;
 
 	rtw89_mac_enable_bb_rf(rtwdev);
-	if (ret)
-		goto fail;
 
 	ret = rtw89_mac_sys_init(rtwdev);
 	if (ret)