rtl8187: Reduce channel switch delay

The latest vendor driver (rtl8187B_linux_26.1036.0708.2008) has a 10 msec
delay after the call to set a new channel, but not before.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Tested-by: NHerton Ronaldo Krzesinski <herton@mandriva.com.br>
Tested-by: NHin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtl8187_dev.c

@@ -870,7 +870,6 @@ static int rtl8187_config(struct ieee80211_hw *dev, u32 changed)
 	 */
 	rtl818x_iowrite32(priv, &priv->map->TX_CONF,
 			  reg | RTL818X_TX_CONF_LOOPBACK_MAC);
-	msleep(10);
 	priv->rf->set_chan(dev, conf);
 	msleep(10);
 	rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);