From: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Date: Thu, 6 Apr 2023 18:05:50 -0500
Subject: fix batadv_is_cfg80211_netdev

Replace CONFIG_CFG80211 with CPTCFG_CFG80211, which is the correct
macro to use when building under backports.

--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -307,8 +307,7 @@ static bool batadv_is_cfg80211_netdev(st
 {
 	if (!net_device)
 		return false;
-
-#if IS_ENABLED(CONFIG_CFG80211)
+#if IS_ENABLED(CPTCFG_CFG80211)
 	/* cfg80211 drivers have to set ieee80211_ptr */
 	if (net_device->ieee80211_ptr)
 		return true;