rt2x00: do not shortcut rt2x00lib_config_antenna

This function was exiting early if the existing diversity settings
were unchanged.  Unfortunately, in some cases the antenna configuration
is not initialized at all.

https://bugzilla.kernel.org/show_bug.cgi?id=14751

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Cc: Gertjan van Wingerde <gwingerde@gmail.com>

drivers/net/wireless/rt2x00/rt2x00config.c

@@ -126,11 +126,6 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 	 * ANTENNA_SW_DIVERSITY state to the driver.
 	 * If that happens, fallback to hardware defaults,
 	 * or our own default.
-	 * If diversity handling is active for a particular antenna,
-	 * we shouldn't overwrite that antenna.
-	 * The calls to rt2x00lib_config_antenna_check()
-	 * might have caused that we restore back to the already
-	 * active setting. If that has happened we can quit.
 	 */
 	if (!(ant->flags & ANTENNA_RX_DIVERSITY))
 		config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx);
@@ -142,9 +137,6 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 	else
 		config.tx = active->tx;
 
-	if (config.rx == active->rx && config.tx == active->tx)
-		return;
-
 	/*
 	 * Antenna setup changes require the RX to be disabled,
 	 * else the changes will be ignored by the device.