wl1271: move wl12xx debugfs directory to under wiphy's debugfs

Use per-device debugfs path, so multiple devices won't collide.

in order to use wl->hw->wiphy->debugfsdir, we have to move the debugfs
creation from wl1271_debugfs_init() to wl1271_register_hw().

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index b2432da..7fecefe 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -2602,6 +2602,8 @@
 
 	wl->mac80211_registered = true;
 
+	wl1271_debugfs_init(wl);
+
 	register_netdevice_notifier(&wl1271_dev_notifier);
 
 	wl1271_notice("loaded");
@@ -2736,8 +2738,6 @@
 	/* Apply default driver configuration. */
 	wl1271_conf_init(wl);
 
-	wl1271_debugfs_init(wl);
-
 	order = get_order(WL1271_AGGR_BUFFER_SIZE);
 	wl->aggr_buf = (u8 *)__get_free_pages(GFP_KERNEL, order);
 	if (!wl->aggr_buf) {