vfs: fix kerneldoc for generic_fh_to_parent()

Wrong function name in the kerneldoc description of generic_fh_to_parent().
Signed-off-by: NYanchuan Nian <ycnian@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

fs/libfs.c

@@ -874,7 +874,7 @@ struct dentry *generic_fh_to_dentry(struct super_block *sb, struct fid *fid,
 EXPORT_SYMBOL_GPL(generic_fh_to_dentry);
 
 /**
- * generic_fh_to_dentry - generic helper for the fh_to_parent export operation
+ * generic_fh_to_parent - generic helper for the fh_to_parent export operation
  * @sb:		filesystem to do the file handle conversion on
  * @fid:	file handle to convert
  * @fh_len:	length of the file handle in bytes