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/Makefile b/net/mac80211/Makefile
index 2b1470b..231ffa0 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -58,4 +58,4 @@
 mac80211-$(CONFIG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
 mac80211-$(CONFIG_MAC80211_RC_MINSTREL_HT) += $(rc80211_minstrel_ht-y)
 
-ccflags-y += -D__CHECK_ENDIAN__
+ccflags-y += -D__CHECK_ENDIAN__ -DDEBUG