mac80211: clean up debugging

There are a few things that make the logging and
debugging in mac80211 less useful than it should
be right now:
 * a lot of messages should be pr_info, not pr_debug
 * wholesale use of pr_debug makes it require *both*
   Kconfig and dynamic configuration
 * there are still a lot of ifdefs
 * the style is very inconsistent, sometimes the
   sdata->name is printed in front

Clean up everything, introducing new macros and
separating out the station MLME debugging into
a new Kconfig symbol.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 512c894..6d5aec9 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -695,6 +695,7 @@
 
 	sprintf(buf, "netdev:%s", sdata->name);
 	if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
-		pr_err("mac80211: debugfs: failed to rename debugfs "
-		       "dir to %s\n", buf);
+		sdata_err(sdata,
+			  "debugfs: failed to rename debugfs dir to %s\n",
+			  buf);
 }