regmap: Do debugfs init before cache init

This allows caches to add custom debugfs files.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/base/regmap/regmap.c

@@ -241,12 +241,12 @@ struct regmap *regmap_init(struct device *dev,
 		goto err_map;
 	}
 
+	regmap_debugfs_init(map);
+
 	ret = regcache_init(map, config);
 	if (ret < 0)
 		goto err_free_workbuf;
 
-	regmap_debugfs_init(map);
-
 	return map;
 
 err_free_workbuf: