wifi: rtl8xxxu: fix error messages

The first parameter of WARN_ONCE() is a condition so this code will end
up printing the function name instead of the proper message.

Fixes: 3ff7a05 ("wifi: rtl8xxxu: support setting bssid register for multiple interfaces")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/7b144531-a8da-4725-8911-9b614a525a35@moroto.mountain

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c

@@ -3593,7 +3593,7 @@ static int rtl8xxxu_set_mac(struct rtl8xxxu_priv *priv, int port_num)
 		reg = REG_MACID1;
 		break;
 	default:
-		WARN_ONCE("%s: invalid port_num\n", __func__);
+		WARN_ONCE(1, "%s: invalid port_num\n", __func__);
 		return -EINVAL;
 	}
 
@@ -3618,7 +3618,7 @@ static int rtl8xxxu_set_bssid(struct rtl8xxxu_priv *priv, const u8 *bssid, int p
 		reg = REG_BSSID1;
 		break;
 	default:
-		WARN_ONCE("%s: invalid port_num\n", __func__);
+		WARN_ONCE(1, "%s: invalid port_num\n", __func__);
 		return -EINVAL;
 	}