wl1251: fix mixed up args for join

The join arguments are mixed up, passing beacon_interval instead of
channel and channel instead of beacon_interval. Fix them.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ti/wl1251/main.c

@@ -1226,8 +1226,8 @@ static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 		if (ret < 0)
 			goto out_sleep;
 
-		ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
-				  wl->channel, wl->dtim_period);
+		ret = wl1251_join(wl, wl->bss_type, wl->channel,
+				  wl->beacon_int, wl->dtim_period);
 
 		if (ret < 0)
 			goto out_sleep;