wifi: nl80211: make nl80211_send_chandef non-static

Expose nl80211_send_chandef functionality for mac80211_hwsim or vendor
netlink can use it where needed.

Signed-off-by: Jaewan Kim <jaewan@google.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Link: https://lore.kernel.org/r/20230322131637.2633968-3-jaewan@google.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/cfg80211.h

@@ -950,6 +950,15 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
 				  const struct cfg80211_chan_def *chandef,
 				  enum nl80211_iftype iftype);
 
+/**
+ * nl80211_send_chandef - sends the channel definition.
+ * @msg: the msg to send channel definition
+ * @chandef: the channel definition to check
+ *
+ * Returns: 0 if sent the channel definition to msg, < 0 on error
+ **/
+int nl80211_send_chandef(struct sk_buff *msg, const struct cfg80211_chan_def *chandef);
+
 /**
  * ieee80211_chanwidth_rate_flags - return rate flags for channel width
  * @width: the channel width of the channel

net/wireless/nl80211.c

@@ -3765,8 +3765,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 	return result;
 }
 
-static int nl80211_send_chandef(struct sk_buff *msg,
-				const struct cfg80211_chan_def *chandef)
+int nl80211_send_chandef(struct sk_buff *msg, const struct cfg80211_chan_def *chandef)
 {
 	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
 		return -EINVAL;
@@ -3797,6 +3796,7 @@ static int nl80211_send_chandef(struct sk_buff *msg,
 		return -ENOBUFS;
 	return 0;
 }
+EXPORT_SYMBOL(nl80211_send_chandef);
 
 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 			      struct cfg80211_registered_device *rdev,