fs: sdcardfs: Add missing option to show_options

unshared_obb was missing from show_options

bug: 133257717
Change-Id: I1bc49d1b4098052382a518540e5965e037aa39f1
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>

fs/sdcardfs/super.c

@@ -311,6 +311,8 @@ static int sdcardfs_show_options(struct vfsmount *mnt, struct seq_file *m,
 		seq_puts(m, ",default_normal");
 	if (opts->reserved_mb != 0)
 		seq_printf(m, ",reserved=%uMB", opts->reserved_mb);
+	if (opts->unshared_obb)
+		seq_printf(m, ",unshared_obb");
 
 	return 0;
 };