mac80211/cfg80211: check endianness in sparse runs

Make sure sparse checks endianness when run on mac80211/cfg80211.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/Makefile b/net/wireless/Makefile
index 9bc412c..938a334 100644
--- a/net/wireless/Makefile
+++ b/net/wireless/Makefile
@@ -8,3 +8,5 @@
 cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o
 cfg80211-$(CONFIG_WIRELESS_EXT) += wext-compat.o
 cfg80211-$(CONFIG_NL80211) += nl80211.o
+
+ccflags-y += -D__CHECK_ENDIAN__