rt2x00: use rt2800_config_channel_rt3x for rt2872

rt2872 needs the same rf register setup as rt3070 and rt3090, hence
use rt2800_config_channel_rt3x instead of rt2800_config_channel_rt2x.
This change allows me to actually switch channels and hence scan all
configured channels on the RT305x SoC platform (which uses a rt2872)
here.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Tested-by: Luis Correia <luis.f.correia@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800lib.c

@@ -827,7 +827,8 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
 	u8 bbp;
 
 	if ((rt2x00_rt(rt2x00dev, RT3070) ||
-	     rt2x00_rt(rt2x00dev, RT3090)) &&
+	     rt2x00_rt(rt2x00dev, RT3090) ||
+	     rt2x00_rt(rt2x00dev, RT2872)) &&
 	    (rt2x00_rf(rt2x00dev, RF2020) ||
 	     rt2x00_rf(rt2x00dev, RF3020) ||
 	     rt2x00_rf(rt2x00dev, RF3021) ||