cfg80211: add tracing to rdev-ops

Add tracing to make debugging cfg80211/mac80211
(or full-mac driver) interaction easier.

Signed-off-by: Beni Lev <beni.lev@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Hila Gonen <hila.gonen@intel.com>
Tested-by: Hila Gonen <hila.gonen@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[add a cast to int to sizeof() to avoid warning]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/Makefile

@@ -10,11 +10,13 @@ obj-$(CONFIG_WEXT_SPY) += wext-spy.o
 obj-$(CONFIG_WEXT_PRIV) += wext-priv.o
 
 cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o scan.o nl80211.o
-cfg80211-y += mlme.o ibss.o sme.o chan.o ethtool.o mesh.o ap.o
+cfg80211-y += mlme.o ibss.o sme.o chan.o ethtool.o mesh.o ap.o trace.o
 cfg80211-$(CONFIG_CFG80211_DEBUGFS) += debugfs.o
 cfg80211-$(CONFIG_CFG80211_WEXT) += wext-compat.o wext-sme.o
 cfg80211-$(CONFIG_CFG80211_INTERNAL_REGDB) += regdb.o
 
+CFLAGS_trace.o := -I$(src)
+
 ccflags-y += -D__CHECK_ENDIAN__
 
 $(obj)/regdb.c: $(src)/db.txt $(src)/genregdb.awk