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>

drivers/net/wireless/wl12xx/debugfs.c

@@ -423,7 +423,8 @@ int wl1271_debugfs_init(struct wl1271 *wl)
 {
 	int ret;
 
-	wl->rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+	wl->rootdir = debugfs_create_dir(KBUILD_MODNAME,
+					 wl->hw->wiphy->debugfsdir);
 
 	if (IS_ERR(wl->rootdir)) {
 		ret = PTR_ERR(wl->rootdir);

drivers/net/wireless/wl12xx/main.c

@@ -2602,6 +2602,8 @@ int wl1271_register_hw(struct wl1271 *wl)
 
 	wl->mac80211_registered = true;
 
+	wl1271_debugfs_init(wl);
+
 	register_netdevice_notifier(&wl1271_dev_notifier);
 
 	wl1271_notice("loaded");
@@ -2736,8 +2738,6 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 	/* 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) {