mac80211: deprecate RX status noise

The noise value as is won't be used, isn't
filled by most drivers and doesn't really
make a whole lot of sense on a per packet
basis -- proper cfg80211 survey support in
mac80211 will need to be different.

Mark the struct member as deprecated so it
will be removed from drivers.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 45d7d44..936bc41 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -543,7 +543,7 @@
  * @signal: signal strength when receiving this frame, either in dBm, in dB or
  *	unspecified depending on the hardware capabilities flags
  *	@IEEE80211_HW_SIGNAL_*
- * @noise: noise when receiving this frame, in dBm.
+ * @noise: noise when receiving this frame, in dBm (DEPRECATED).
  * @antenna: antenna used
  * @rate_idx: index of data rate into band's supported rates or MCS index if
  *	HT rates are use (RX_FLAG_HT)
@@ -554,7 +554,7 @@
 	enum ieee80211_band band;
 	int freq;
 	int signal;
-	int noise;
+	int noise __deprecated;
 	int antenna;
 	int rate_idx;
 	int flag;