mac80211: remove deprecated noise field from ieee80211_rx_status

Also remove associated IEEE80211_HW_NOISE_DBM from ieee80211_hw_flags.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 14cf3bd..e057559 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4904,8 +4904,7 @@
 
 	/* fill hw info */
 	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
-		    IEEE80211_HW_SIGNAL_DBM |
-		    IEEE80211_HW_NOISE_DBM;
+		    IEEE80211_HW_SIGNAL_DBM;
 
 	hw->wiphy->interface_modes =
 		BIT(NL80211_IFTYPE_AP) |