wl1271: remove unecessary qual parameter from rx status

The qual element in ieee80211_rx_status is not used anymore, so we don't need
to set it in the wl1271_rx_status() function.  This saves a bit of time in
the RX path.
Signed-off-by: NLuciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_rx.c

@@ -91,12 +91,6 @@ static void wl1271_rx_status(struct wl1271 *wl,
 	 */
 	status->signal = desc->rssi;
 
-	/* FIXME: Should this be optimized? */
-	status->qual = (desc->rssi - WL1271_RX_MIN_RSSI) * 100 /
-		(WL1271_RX_MAX_RSSI - WL1271_RX_MIN_RSSI);
-	status->qual = min(status->qual, 100);
-	status->qual = max(status->qual, 0);
-
 	/*
 	 * FIXME: In wl1251, the SNR should be divided by two.  In wl1271 we
 	 * need to divide by two for now, but TI has been discussing about