ext4: reject journal options for ext2 mounts

There is no reason to allow ext2 filesystems be mounted with journal
mount options. So, this patch adds them to the MOPT_NO_EXT2 mount
options list.
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/super.c

@@ -1394,9 +1394,9 @@ static const struct mount_opts {
 	{Opt_stripe, 0, MOPT_GTE0},
 	{Opt_resuid, 0, MOPT_GTE0},
 	{Opt_resgid, 0, MOPT_GTE0},
-	{Opt_journal_dev, 0, MOPT_GTE0},
-	{Opt_journal_path, 0, MOPT_STRING},
-	{Opt_journal_ioprio, 0, MOPT_GTE0},
+	{Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0},
+	{Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING},
+	{Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0},
 	{Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ},
 	{Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ},
 	{Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA,