regmap: debugfs: Free map->debugfs_name when debugfs_create_dir() failed

Free map->debugfs_name when debugfs_create_dir() failed to avoid memory
leak.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/regmap-debugfs.c

@@ -584,6 +584,9 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
 	map->debugfs = debugfs_create_dir(name, regmap_debugfs_root);
 	if (!map->debugfs) {
 		dev_warn(map->dev, "Failed to create debugfs directory\n");
+
+		kfree(map->debugfs_name);
+		map->debugfs_name = NULL;
 		return;
 	}