p54: remove usage of deprecated noise value

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c
index 2ceff54..4e68910 100644
--- a/drivers/net/wireless/p54/txrx.c
+++ b/drivers/net/wireless/p54/txrx.c
@@ -350,7 +350,6 @@
 		rx_status->flag |= RX_FLAG_MMIC_ERROR;
 
 	rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi);
-	rx_status->noise = priv->noise;
 	if (hdr->rate & 0x10)
 		rx_status->flag |= RX_FLAG_SHORTPRE;
 	if (priv->hw->conf.channel->band == IEEE80211_BAND_5GHZ)